Compatible with any small CNC using R8 or MT3 taper, Model PN 31163 tension/compression tapping head includes tapping chuck and 9 quick-change collets. It is compatible with ANSI-compliant inch (0 to 1/2 in.) and metric (M1.6 to M12) taps and has 3/4 in. of float built in to maintain coordination of spindle speed and feed rate. Tool works seamlessly with PCNC 1100 mill, and with other manufacturers' machines that can accept 3/4 in. shank.