Description:  3/8 1/2 Inch SDS Socket Driver Adapter Drive Bit Power Drill Chuck Extension Adapter.     Features:  1. It is a Special Direct System.  2. High occlusion, can match perfectly, greatly decrease harm to screw.  3. Converts drill into a power socket driver.  4. Spring-loaded ball bearing locks onto sockets.  5. This set is perfect for your impact driver or drill and allows you to replace your ratchet with a power tool.  6. With weak magnetic on its head, convenient to use, easy to install and handle.  7. For use with SDS plus fitting drills.     Specification:  Material: 406 Steel;  Handle type: round handle;  Handle diameter:1cm;  Adapter diameter: 1/2":1.27cm,; 3/8": 0.95cm;  Total length:6cm;     Note:  The package includes one adapter only.  Please select the size you want.     Package Included:  1x Chuck Adapter