【Durable Brass Heat Inserts】Crafted from brass, these heat set inserts deliver thermal conductivity, anti-fracture strength, and long-lasting performance— for embedding in high- projects requiring reliable hold.

【Knurled Metric Thread Design】Deep knurled threads lock tight with grip. No slippage under tension. You install once and get secure, lasting results without rework.​

【Optimized for Plastic and Printing】Fits PLA, PETG and ABS flawlessly. Tackle your prints, plastic molding, and repairs with zero fit issues—no ruined projects from mismatched inserts.

【Metric Assortment Kit】15 sizes (M2, M2.5, M3, M4, M5, M6）in kit. Cover every project without mid-job runs to the store—save your time and keep your workflows track.​

【What You Get】400- nut inserts kit (15 sizes), neatly organized in labeled, easy-access storage boxes. Backed by responsive customer support for your peace of mind.