Lisle 70640 Socket For use in restricted areas Ideal for use in areas where a T handle won't fit Sockets fits all number and fractional M.C.T.I. standard taps through 1/2"; Also fits 1/8" NPT taps and metric taps through 12mm manufactured to M.C.T.I. standards For more information check the main Lisle tool- 70500 Replacement part for Lisle tool- 70500