·Powerful Adjustable Resistance (66-110 LBS)：Engineered with snap-button resistance technology, this twister arm trainer effortlessly switches between 66-110LBS of force to match your evolving fitness journey. Whether you’re rehabilitating muscles, warming up, or pushing for advanced muscle definition, its versatile resistance range grows with you. 

U-Shape Design for Full-Body Muscle Activation：Unlike traditional straight-grip trainers, our innovative U-shaped chest workout equipment engages over 10 muscle groups simultaneously—from chest (pectorals), arms (biceps/triceps), and shoulders (deltoids) to back, core, and even legs. Maximize efficiency by targeting multiple zones in one fluid motion. 

Industrial-Grade Steel Frame & Non-Slip Grips ：Built with thickened, high-carbon steel, this rugged arm chest trainer withstands extreme pressure without bending. Paired with sweat-absorbing foam handles, it delivers a comfortable, secure grip that prevents slippage during high-intensity routines—so you train harder and safer. 

·Silent-Spring Technology with Safety Guard：High-tensile steel springs maintain elasticity through thousands of reps, while premium leather sleeves prevent pinching and rust. Experience near-silent operation (even after prolonged use) thanks to this arm trainer that minimizes metal friction—ideal for home or office workouts. 

Portable & Space-Smart Design：Collapses into a compact footprint for instant storage under beds, in closets, or suitcases. This travel-ready chest and arm trainer assembles in seconds without tools—enabling gym-quality training anywhere: travel, work breaks, or small living spaces.

Specification:

·Brand: WARMOUNTS

·Color: Black+Blue

·Material: Steel + Foam

·Item Weight: 3.53 Pounds

·Resistance: ‎66LBS, 88LBS, 110LBS

·Expanded size: ‎26.38" x 6.50" x 1.38"

·Storage size: 7.09" x 9.84"

·Package Included:Twister arm trainer*1