The collet is made of brass material, which is sturdy and durable, after heat treatment, it has high hardness and is not easy to wear, it is compatible with cordless and corded rotary tools.
The keyless chuck is made of alloy material, with high hardness and durability,its three jaw chuck has high accuracy and can tightly grasp the tiny drill bit, so that the working efficiency of the rotary tool can be improved under high-speed rotation.