Knuckle Bolt

Boxing and martial arts equipment for knuckle bolt training.

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GJANSH
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GJANSH

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GJANSH Propane Refill Adapter with Metal Ball Valve & Precise Filling Gauge - LPG Gas Accessory, QCC1 Compatible, Glow-in-Dark Read for Easy Visibility, Fills 1lb Bottles from 20lb Tank, Fits Disposable Cylinders, Durable Outdoor Universal Accessory
$19.98(-50%)
GJANSH Tall Stair Gauges for Framing Square with Holder and Hook, Framing Jig for Speed Square, Framing Square Stops for Carpentry Squares & Circular Saw
$19.98
GJANSH 8 Pack Titanium GJANSH Coated HSS Twist Drill Bits, 3-10mm Serrated Side Cutting Drill Bit Woodworking Tools for Plastic Metal Wood Hole,fathersdaygift
$16.99
100pcs Nylon Universal Cable Tie Buckle, Cable Tie with Buckle, Multipurpose Plastic Cable Ties Buckles Tool for Car Daily Repair (20PC)
$12.97
GJANSH AC Valve Core Remover Installer Tool with Dual Size SAE 1/4 & 5/16 Port, 20 PCS Valve Cores with Teflon Seal and 10 PCS Brass Nuts, Compatible with R22 R12 R407 R410 R404 R32 R600 A/C
$25.37(-15%)
Universal 24V12V Circuit Breaker, ABS Resin, Anti-Leakage Design, for Battery Disconnect, Hardwired, 36V Max Voltage, Battery Accessories
$17.20

GJANSH 20Pcs/Set Bumper Fender Washers Engine Bay Dress Up Bolts Fasteners M6 JDM Fender Washer Kit
Free shipping
GJANSH

GJANSH 20Pcs/Set Bumper Fender Washers Engine Bay Dress Up Bolts Fasteners M6 JDM Fender Washer Kit

4.71.4K sold
-38%$12.99$20.79
M4 x 10mm Thread Knurled Thumb Screws, 10 count, Black
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M4 x 10mm Thread Knurled Thumb Screws, 10 count, Black

Limited time deal
$6.49
304 Stainless Steel Silvery Multi-Size Assorted Kit - 30pcs M3 Flat Knurled Head Fully Threaded Thumb Screws Bolts (6 Sizes)

304 Stainless Steel Silvery Multi-Size Assorted Kit - 30pcs M3 Flat Knurled Head Fully Threaded Thumb Screws Bolts (6 Sizes)

$8.45
Axion CNC Cut Billet 6061 Aluminum Knurled Seat Bolt Kit for Harley - Knurled Grip, Secure Hold, 2-Tone Design
Free shipping

Axion CNC Cut Billet 6061 Aluminum Knurled Seat Bolt Kit for Harley - Knurled Grip, Secure Hold, 2-Tone Design

$24.99
M4 x 10mm Thread Knurled Thumb Screws, 10 count, Black
Free shipping

M4 x 10mm Thread Knurled Thumb Screws, 10 count, Black

Limited time deal
$6.49
516Pcs Nuts and Bolts Assortment Kit 21-Sizes M3/M4/M5/M6 Nut Bolt Washer Assortment Kit for Machinery, Furniture, Automotive, Motorcycle Repairs

516Pcs Nuts and Bolts Assortment Kit 21-Sizes M3/M4/M5/M6 Nut Bolt Washer Assortment Kit for Machinery, Furniture, Automotive, Motorcycle Repairs

5 sold
Limited time deal00:00:00
-11%$8.00$8.98
Heavy30Pcs/90Pcs Heavy-Duty Zinc-Plated Carbon Steel Button Rivet Nuts Set,Durable, Rustproof, Bolt - Hollow Doors, Drywall & Automotive Repair (M4-M6 Sizes)
Free shipping

Heavy30Pcs/90Pcs Heavy-Duty Zinc-Plated Carbon Steel Button Rivet Nuts Set,Durable, Rustproof, Bolt - Hollow Doors, Drywall & Automotive Repair (M4-M6 Sizes)

14 sold
-37%$9.87$15.68
30Pcs Heavy-Duty Zinc-Plated Carbon Steel Button Rivet Nuts Set - Multi-Size M4-M6 Screw-In Nut & Bolt Sets with 2 Wrenches, Durable Rustproof Hardware for Hollow Walls, Sheet Metal, Automotive Panel Fixing
Free shipping

30Pcs Heavy-Duty Zinc-Plated Carbon Steel Button Rivet Nuts Set - Multi-Size M4-M6 Screw-In Nut & Bolt Sets with 2 Wrenches, Durable Rustproof Hardware for Hollow Walls, Sheet Metal, Automotive Panel Fixing

5.070 sold
Limited time deal
$7.99
D&L BROSHW 919-Piece Hex Bolt & Nut Assortment Kit with Washers - Grade 8.8 Alloy Steel, Yellow Zinc Plated, Corrosion-Resistant, Even Force Distribution, M4-M8 Sizes, High Hardness, Heavy Duty, Dual-Sided Storage Case, Ideal for Home DIY & Professionals
Free shipping

D&L BROSHW 919-Piece Hex Bolt & Nut Assortment Kit with Washers - Grade 8.8 Alloy Steel, Yellow Zinc Plated, Corrosion-Resistant, Even Force Distribution, M4-M8 Sizes, High Hardness, Heavy Duty, Dual-Sided Storage Case, Ideal for Home DIY & Professionals

4.5326 sold
Flash sale
$39.88
Assorted Nuts and Bolts Set with Flat Washers, 919-Piece 8.8 Metric Alloy Steel M4-M8 Fasteners, Yellow Zinc Plating, 12-30mm Length, Yellow Box, Corrosion-Resistant Tools for Car Repair, DIY & Furniture Projects
Free shipping

Assorted Nuts and Bolts Set with Flat Washers, 919-Piece 8.8 Metric Alloy Steel M4-M8 Fasteners, Yellow Zinc Plating, 12-30mm Length, Yellow Box, Corrosion-Resistant Tools for Car Repair, DIY & Furniture Projects

5.071 sold
Limited time deal
-35%$51.84$79.76
400PCS Metric Flange Bolt Assortment Kit,M6x1.0, M8x1.25, M10x1.5 Bolts(12mm to 45mm),Hex Bolts and Nuts Washers Kit,Metric Bolt Assortment for Automotive Fasteners,10.9 Black Zinc Galvanized

400PCS Metric Flange Bolt Assortment Kit,M6x1.0, M8x1.25, M10x1.5 Bolts(12mm to 45mm),Hex Bolts and Nuts Washers Kit,Metric Bolt Assortment for Automotive Fasteners,10.9 Black Zinc Galvanized

Limited time deal00:00:00
$36.69
Mywish 380 Pcs M4 Screw Nuts and Bolts Assortment Kit, 304 Stainless Steel Button Head Socket Cap Metric Screws Bolts, Spring & Flat Lock Washers/Nuts/Hex Wrenches, M4*8/10/12/16/20/25/30

Mywish 380 Pcs M4 Screw Nuts and Bolts Assortment Kit, 304 Stainless Steel Button Head Socket Cap Metric Screws Bolts, Spring & Flat Lock Washers/Nuts/Hex Wrenches, M4*8/10/12/16/20/25/30

Limited time deal00:00:00
$9.65
Taiss 966pcs Grade 8.8 Metric Bolt Assortment,Metric Bolts and Nuts Assortment,Bolt Kit M4 M5 M6 M8(12-30mm) Heavy Duty Hex Bolts and Nuts Kit Flat/Lock Washer Yellow Zinc Plated,with Handheld Box

Taiss 966pcs Grade 8.8 Metric Bolt Assortment,Metric Bolts and Nuts Assortment,Bolt Kit M4 M5 M6 M8(12-30mm) Heavy Duty Hex Bolts and Nuts Kit Flat/Lock Washer Yellow Zinc Plated,with Handheld Box

Limited time deal
$13.16
ALLGOOD 100% Brand New 93-Piece Grade 10.9 M5-M8 Zinc Plated Heat Treated Body Bolt Kit - 93 Bolts, M5-M8 Sizes, USA-Sourced Automotive Accessories for Honda CR-60/80/85/125/250/450/480/500 Fender Mounts, Seat Shrouds
Free shipping

ALLGOOD 100% Brand New 93-Piece Grade 10.9 M5-M8 Zinc Plated Heat Treated Body Bolt Kit - 93 Bolts, M5-M8 Sizes, USA-Sourced Automotive Accessories for Honda CR-60/80/85/125/250/450/480/500 Fender Mounts, Seat Shrouds

$18.99
HPI Racing HPI161184 M2 x 16mm Hex Socket Button Head Fastener Screws, 10 Pieces
Free shipping

HPI Racing HPI161184 M2 x 16mm Hex Socket Button Head Fastener Screws, 10 Pieces

$25.81
2251-Piece Metal & Wood Hardware Assortment Kit with Screws, Nuts, Bolts, Washers (3 Trays)

2251-Piece Metal & Wood Hardware Assortment Kit with Screws, Nuts, Bolts, Washers (3 Trays)

Limited time deal
$52.62
【TikTokShopBlackFriday】VEVOR 2250 Pcs Bolts and Nuts Assortment Kit,Metric + Imperial Machine Screws and Flat WashersAlloy Steel M3/M4/M5/M6/M8 Multiple Sizefor Equipment/Vehicle Assembly,Galvanized White, Hex Cap Screws
Free shipping
VEVOR Store

【TikTokShopBlackFriday】VEVOR 2250 Pcs Bolts and Nuts Assortment Kit,Metric + Imperial Machine Screws and Flat WashersAlloy Steel M3/M4/M5/M6/M8 Multiple Sizefor Equipment/Vehicle Assembly,Galvanized White, Hex Cap Screws

4.944 sold
$44.07
8.8 Grade Hex Head Bolt Assortment, 919-Piece Zinc-Plated Anti-Corrosive Set with M4-M8 Nuts/Washers, 12-30mm Fasteners for Summer Dock, Pier Repairs (Yellow Box Packaging)

8.8 Grade Hex Head Bolt Assortment, 919-Piece Zinc-Plated Anti-Corrosive Set with M4-M8 Nuts/Washers, 12-30mm Fasteners for Summer Dock, Pier Repairs (Yellow Box Packaging)

5.012 sold
Limited time deal
-35%$51.77$79.64
919 Pcs Grade 8.8 Metric Bolt Assortment, M4 M5 M6 M8 Heavy Duty Bolts and Nuts Kit, Yellow Zinc Plated, Length from 12-30mm (Yellow Box)

919 Pcs Grade 8.8 Metric Bolt Assortment, M4 M5 M6 M8 Heavy Duty Bolts and Nuts Kit, Yellow Zinc Plated, Length from 12-30mm (Yellow Box)

8 sold
Limited time deal
$82.09
240pcs M4 M5 Hex Bolts, Hex Cap Screws and Nuts Kit - 6-Size Assortment, Corrosion-Resistant Heavy-Duty Fasteners with Durable Storage Box, Right-Hand Thread for Secure Connections Heavy Duty Fastening (Compatible with M4 M5 Screws)

240pcs M4 M5 Hex Bolts, Hex Cap Screws and Nuts Kit - 6-Size Assortment, Corrosion-Resistant Heavy-Duty Fasteners with Durable Storage Box, Right-Hand Thread for Secure Connections Heavy Duty Fastening (Compatible with M4 M5 Screws)

4.0189 sold
-48%$8.00$15.39
Billovcc 4 PCS Decor + Security Anti-Theft Pointed Tip Metal Bolts - Durable, Reliable Fixings, Decorative Spikes for Cars, Trucks, Motorcycles, Automotive Exterior Car Accessory to Enhance Security
Free shipping

Billovcc 4 PCS Decor + Security Anti-Theft Pointed Tip Metal Bolts - Durable, Reliable Fixings, Decorative Spikes for Cars, Trucks, Motorcycles, Automotive Exterior Car Accessory to Enhance Security

4.5180 sold
-25%$7.49$9.99
Taiss 400PCS Metric Flange Bolt Assortment Kit,M6x1.0, M8x1.25, M10x1.5 Bolts(12mm to 45mm),Hex Bolts and Nuts Washers Kit,Metric Bolt Assortment for Automotive Fasteners,10.9 Black Zinc Galvanized

Taiss 400PCS Metric Flange Bolt Assortment Kit,M6x1.0, M8x1.25, M10x1.5 Bolts(12mm to 45mm),Hex Bolts and Nuts Washers Kit,Metric Bolt Assortment for Automotive Fasteners,10.9 Black Zinc Galvanized

10 sold
Limited time deal00:00:00
-11%$35.00$39.32
ALLGOOD Fit For Honda Body Bolts- M6 1.0 x 20mm Long- 10mm Hex- 17mm Washer 20 Bolts USA Package New
Free shipping

ALLGOOD Fit For Honda Body Bolts- M6 1.0 x 20mm Long- 10mm Hex- 17mm Washer 20 Bolts USA Package New

3 sold
-55%$11.76$26.13
Hillman Galvanized Hex Bolts, 0.5x3 In, for Wood-to-Wood, Metal-to-Metal & DIY Projects (50 Pack)
Free shipping
Spreetail

Hillman Galvanized Hex Bolts, 0.5x3 In, for Wood-to-Wood, Metal-to-Metal & DIY Projects (50 Pack)

2 sold
-83%$19.99$118.99
summerwins 1260pcs Upgraded-Coated 12.9 Grade Metric Hex Socket Head Cap Machine Screws Set - Metric Bolts Set with Hex Nuts, Washers (21 Sizes: 4mm-30mm) for Home Supplies, Machine Fastening, 12.9 Strength Bolts
Free shipping

summerwins 1260pcs Upgraded-Coated 12.9 Grade Metric Hex Socket Head Cap Machine Screws Set - Metric Bolts Set with Hex Nuts, Washers (21 Sizes: 4mm-30mm) for Home Supplies, Machine Fastening, 12.9 Strength Bolts

4.063 sold
-50%$17.25$34.24
【TikTokShopBlackFriday】VEVOR 2250 Pieces Bolt & Nut Assortment Kit, Rust-Resist Galv Alloy Steel Hex Cap Screws with Metric (M3-M8) & Imperial Sizes, Flat Washers, 3 Adjustable Transparent Storage Boxes, 48-Hour Salt Spray Test, for Furniture & Equipment
Free shipping
VEVOR Store

【TikTokShopBlackFriday】VEVOR 2250 Pieces Bolt & Nut Assortment Kit, Rust-Resist Galv Alloy Steel Hex Cap Screws with Metric (M3-M8) & Imperial Sizes, Flat Washers, 3 Adjustable Transparent Storage Boxes, 48-Hour Salt Spray Test, for Furniture & Equipment

4.61.9K sold
$44.07
Black Metal Automotive Fastener Kit - 20pcs/50pcs Repair Fasteners & Clips, 1/4" Hex Head Body Bolts, Car Interior Accessories for Secure Fender & Bumper Installation, Black Metal Fasteners & Clips
Free shipping

Black Metal Automotive Fastener Kit - 20pcs/50pcs Repair Fasteners & Clips, 1/4" Hex Head Body Bolts, Car Interior Accessories for Secure Fender & Bumper Installation, Black Metal Fasteners & Clips

4.68.1K sold
-50%$11.69$23.37
VKKM 420 Pieces Stainless Steel Bolt and Nut Kit - M2.5 Fully Threaded Round Head Machine Screws, Hex Nuts & Flat Washers Assortment with Storage Box for DIY Hobby Model Building, Household Appliance Maintenance
Free shipping

VKKM 420 Pieces Stainless Steel Bolt and Nut Kit - M2.5 Fully Threaded Round Head Machine Screws, Hex Nuts & Flat Washers Assortment with Storage Box for DIY Hobby Model Building, Household Appliance Maintenance

3.015 sold
-30%$23.79$33.99
FOLIV 907pcs Grade 8.8 Metric Bolt Assortment, M4 M5 M6 M8 Heavy Duty Bolts and Nuts Kit, Yellow Zinc Plated, Length from 12-30mm
Free shipping

FOLIV 907pcs Grade 8.8 Metric Bolt Assortment, M4 M5 M6 M8 Heavy Duty Bolts and Nuts Kit, Yellow Zinc Plated, Length from 12-30mm

4.92.3K sold
$89.99
1760PCS Metric Large Screw Assortment Set - M2-M3-M4-M5 Hex Socket Head Cap Bolts, Nuts & Washers, Grade 12.9 Black Zinc Plated Alloy Steel, for DIY Repair, Automotive Fasteners, Large Set
Free shipping

1760PCS Metric Large Screw Assortment Set - M2-M3-M4-M5 Hex Socket Head Cap Bolts, Nuts & Washers, Grade 12.9 Black Zinc Plated Alloy Steel, for DIY Repair, Automotive Fasteners, Large Set

5 sold
-35%$27.87$42.88
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Introduction

Knuckle bolts are compact striking tools used in controlled martial arts drills and self-defense practice.

  • Textured grip surfaces reduce slippage during repetitive impact training.
  • Lightweight metal or polymer construction allows focus mitt and heavy bag sessions without added wrist load.
  • Compact profile fits in gym bags alongside gloves, wraps, and focus mitts.

Train safely with proper form and protective gear.

FAQs

Local laws vary; check regulations before purchase or transport, and consider non-lethal alternatives where restricted.

Slide fingers through the grip openings, keep the striking surface aligned with your knuckles, and maintain a neutral wrist position.

Start with instructor guidance, focus mitts, and hand wraps to develop proper alignment and avoid injury.

Wipe clean after use, apply light oil to prevent rust, and store in a dry place away from extreme temperatures.

Most organized events prohibit metal striking tools; they are intended for solo drills or demonstration only.