Home > Shop > Tools > Power Tool Accessories > Driver Bit & Holders > BOSCH SPEEDCORE 7" SDS-PLUS THIN-WALL CORE BIT EXTENSION BOSCH SPEEDCORE 7" SDS-PLUS THIN-WALL CORE BIT EXTENSION Item #: 21654110 Mfr #: T3925SC $60.50 each Checking Inventory Add to Cart