Features:* Special direct system plus round shank.* High occlusion, can fit perfectly, greatly reduces screw damage.* Converts the drill into a power socket driver.* Spring-loaded ball bearing locks onto sockets.* This set is perfect for impact wrench or drill and allows you to replace the pawl with a power tool.* With a weak magnet on the head, convenient to use, easy to install and operate.* For use with SDS plus assembly drills. Specification: Product Name: SD Adapter Material: 40CR steel Color: Gray Size: (approx.) 1/2" SDS shank adapter (75mm) 3/8" SDS shank adapter (65mm) 1/4" SDS shank adapter (65mm) Shaft: round shank SDS Suitable for: most electric screwdrivers, drills and chucks. Quantity: 3Pcs set Package includes: 3 SDS Adapter Note: 1. Transition: 1cm = 10mm = 0.39 inch. 2. The actual colors of the item may vary slightly different from the website pictures caused by many factors such as brightness of your monitor and light brightness.3.Please allow slight manual measurement deviation for the data.