Park Tool BTS-1 BB Tapping Facing Use the Park Tool BTS-1 tool to prep the bottom bracket shell of your new build for bottom bracket installation, or clean up a previously crossed threaded shell. The BTS-1 is a precision tool system which provides a piloted means of tapping the threads in the bottom bracket shell of a frame. After tapping, the taps act as guides to keep the included facing cutter perfectly square with the axis of the bottom bracket for cleanup of the faces of the bottom bracket shell. For sharpening services of cutting tools see Park Tool Sharpening Services. Always use cutting fluid such as Park Tool CF-2 when machining. Features Guides and taps bottom bracket shells for a smooth installation Accurately faces the bottom bracket for precision operation Related Articles CUTTER SELECTION GUIDE BASIC THREAD CONCEPTS BOTTOM BRACKET TAPPING, THREADING, CHASING, AND FACING BTS-1 INSTRUCTIONS Manufacturer's Part No: BTS-1 UPC: 763477000903 | Park Tool Bts-1 BB Tapping & Facing Bts-1