The stanley sds plus screwdriver bit holder and chuck adaptor is a dual-function drill adaptor designed to expand the versatility of sds plus rotary hammer drills. Fitting directly into the sds plus chuck of a rotary hammer, this adaptor features a 1 2 x 20 unf male thread that allows a compatible drill chuck to be mounted, enabling standard drill bits to be used in an sds drill. This makes it a practical solution for contractors who need to switch between drilling tasks without reaching for a separate tool. The adaptor also incorporates an integrated 1 4 hex bit holder, allowing it to be used as an sds plus screwdriver bit holder when a chuck is not required. This dual functionality makes it well suited to tradespeople who regularly use their sds drill for a mix of drilling and driving applications. Please note: this adaptor must not be used in hammer mode. Features and benefits: two tools in one functions as both an sds plus chuck adaptor and a screwdriver bit holder 1 2 x 20 unf male thread for mounting a compatible drill chuck integrated 1 4 hex bit holder for use with standard screwdriver bits enables a wide range of accessories to be used in an sds rotary hammer drill sds plus shank for secure fitment in compatible rotary hammer drills specifications: shank: sds plus thread: 1 2 x 20 unf male requires 1 2 x 20 unf female chuck contents: adaptor only chuck not included