With the Bosch HA1030 SDS-max® to SDS-plus® Rotary steel Adapter, the user has the opportunity to extend the versatility of an SDS-max® rotary hammer without having to bring along a second hammer. The adapter fits the SDS-max® tool to use SDS-plus® accessories. This accessory allows smaller hole drilling as well as having a larger hammer for bigger jobs. The adapter is compatible with other brands of SDS-max® rotary hammers. This rugged adapter stands up to professional jobsite demands. It has a 3/4 In. notched shank that enables secure retention in the chuck.