Brand: HEWLEEHL Material: Brass Compatible Devices: Drilling Machine Included Components: Brass Collet and Nut About this item: This metal collet adopts an integrated structural design, with a high-strength metal shell and patterned design, providing high friction, durability. It has a ratchet self-locking design, which is firmly clamped and not easy to fall off, ensuring safety issues during use. It is suitable for machines with 3/8" threads. After installation, idle for one minute to confirm that the installation is tight and ensure the normal operation of the machine.