With this adapter, you only need one SDS-Max hammer to use all sizes of SDS-Max drills as well as SDS-Plus drill bits without having to purchase another SDS-Plus hammer tool. The SDS-Plus quick-change chuck can hold all sizes of SDS-Plus bits stable with easy insertion and removal. Drilling with this adapter is precise and effortless. The surface of this SDS Max to SDS is sandblasted to prevent rust and can be used for a long time according to industrial testing standards. Our SDS Max to SDS Plus adapter is made of high-quality chrome vanadium steel, a professional adapter, whose durability is fully guaranteed. Allows the use of SDS Plus drill bits in an SDS Max rotary hammer. This SDS Max to SDS rotary hammer fits all standard SDS Max drills, you can use it for different purposes according to your own needs. Features: 1. Made of high quality chrome vanadium steel, professional adapter, durability is fully assured. 2. Surface sandblasting, helps prevent rust. 3. Fits all standard SDS