Home > Shop > Tools > Power Tool Accessories > Driver Bit & Holders > BOSCH SPEEDCORE 17" SDS-PLUS THIN-WALL CORE BIT EXTENSION BOSCH SPEEDCORE 17" SDS-PLUS THIN-WALL CORE BIT EXTENSION Item #: 21654130 Mfr #: T3927SC $78.55 each Checking Inventory Add to Cart