Lisle LIS70500 8 Piece Tap Socket Set for all MCTI Taps thru 1/2 in. Features and Benefits: For use in restricted areas. Ideal for use in areas where a T-handle won"t fit. Set of 8 sockets fits all number and fractional M.C.T.I. standard taps thru 1/2". Also fits 1/8" NPT.