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.