This SDS Plus shank chuck adaptor has a 1/2" x 20 UNF thread which enables a drill chuck to be mounted for using standard drill bits in an SDS rotary hammer drill. It also features an integrated 1/4" hex bit holder, so it can alternatively be used as an SDS Plus screwdriver bit holder. Please note this adaptor should not be used in hammer mode. Features and Benefits • SDS Plus screwdriver bit holder and chuck adaptor in one • Thread for mounting a drill chuck • Integrated 1/4" hex screwdriver bit holder • Enables a wide variety of accessories to be used in an SDS drill Specifications • Shank: SDS Plus • Thread: 1/2" x UNF Male (Requires 1/2" x 20 UNF Female Chuck) Contents • Adaptor Only • Chuck Not Included