Features: 100% brand new and high quality. SDS Plus Socket Driver Set. SDS Plus Drill 1/4" 3/8" & 1/2" Socket Set Nut Impact Driver Adaptors. SDS Drive Bit Power Drill Socket Driver Extension Adapters 1/4 3/8 1/2. It is a Special Direct System. 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. Specification: Material: Chrome vanadium steel Adapter diameter:1/4" (65mm length), 3/8" (65mm length), 1/2" (75mm length) Package include: 1pc 1/4" adapter 1pc 3/8" adapter 1pc 1/2" adapter