With this adapter, you only need an SDS-Max hammer drill to use all sizes of SDS-Max drill bits as well as SDS-Plus drill bits without having to buy a separate SDS-Plus hammer drill attachment. The SDS-Plus quick-change chuck securely holds all sizes of SDS-Plus bits with easy insertion and removal. Drilling with this adapter is precise and effortless. The surface of this SDS Max to SDS adapter is sandblasted to prevent rust and can be used for a long time according to industry testing standards. Our SDS Max to SDS Plus adapter is made of high-quality chrome vanadium steel, a professional-grade adapter whose durability is fully guaranteed. Allows the use of SDS-Plus drill bits in an SDS Max rotary hammer drill. This SDS Max to SDS rotary hammer adapter fits all standard SDS Max drills, allowing you to use it for various purposes depending on your needs. Features: 1. Made of high-quality chrome vanadium steel, this professional adapter ensures durability. 2. Sandblasted surface helps