It can be used for various tasks such as drilling with a pin vise drill blade attached and attaching a tip bit for a small router to use it like a hand-held file.Compatible with round bar-shaped tools with a shaft diameter of 0.3 to 3.2 mm.The main body is made of lightweight aluminumThe tail cap at the rear end can be removed, and the inside is a storage space for storing tools.A magnet is attached to the tail cap, making it easy to take out the stored tools.