If you regularly use a rotary hammer, the Makita adapter, SDS-Plus to ¼” hex delivers maximum convenience. The adapter allows use of ¼” hex bits on SDS-Plus rotary hammers (bits and rotary hammers sold separately). the adapter eliminates the need to utilize a separate drill or impact driver for drilling or fastening applications. This convenient compatibility gives rotary hammer users access to Makita's extensive line of fastening accessories that are engineered for use in high-torque fastening applications, including impact Gold® and impactx™ insert bits, nutsetters, bit holders, impact sockets, and more. The adapter is for use in “rotation only” mode on rotary hammers, and is specially designed with a shorter shank that helps prevent damage from accidental use in “hammering with rotation” mode.