Home > Shop > Tools > Power Tool Accessories > Driver Bit & Holders > BOSCH SPEEDCORE 13" SDS-PLUS THIN-WALL CORE BIT EXTENSION BOSCH SPEEDCORE 13" SDS-PLUS THIN-WALL CORE BIT EXTENSION Item #: 21654120 Mfr #: T3926SC $68.90 each Checking Inventory Add to Cart