Features and Benefits:75 piece set covers taps and dies from #4 to 1/2 in. and from 3mm to 12mm Ratcheting "T" Wrench provides a 5 degree ratcheting arc for tapping engine blocksReplaces need for slower existing tap and die wrenchesReversible lever allows quick change from forward to reverse eliminates hand over hand turningTwist Lock Gui....(more info)