It features a standard hexagonal interface with built-in strong magnets, which holds the bit firmly in place, so you don't have to worry about the bit falling off during use Comes with 3 different sizes of gear lock heads (10/13/16MM) to fit various types of chucks, from chuck to electric drill chucks, making it versatile for multiple tools Equipped with a bi-directional ratchet for easy forward and reverse operation. Simply turn the dial to change directions making tightening and loosening quick and easy The precision gear system provides a firm grip and prevents slipping, chipping and damage. Even force distribution ensures smooth rotation It includes short bits specifically designed for narrow and hard to reach areas so you can work efficiently without compromising in tight spaces, Manufacturer: Lerpwige