Features: Special direct system plus round shank. High occlusion, can matched perfectly, greatly decrease harm to screw. Converts drill into a power socket driver. Spring-loaded ball bearing locks on to sockets. This set is perfect for your impact driver or drill, and allows you to replace your ratchet with a power tool. With weak magnetic on its head, convenient to use, easy to be install and handle. For use with SDS plus fitting drills. Specifications: Material: 40CR steel Size: 1/4 3/8 1/2 Inch Shank: SDS round shank Length: Approx.60mm Quantity: 3pcs Package Contents: 3 x Chuck Adapter Note: 1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2. Please allow slight manual measurement deviation for the data.