Morse Taper Tap Collet Chuck - Select Size for Shank Taps
Here is a variety of tap collet chuck. Sold individually, you are select. Tap size M6/M8 with 6.3mm shank and 5mm drive square. Tap size M10 with 8mm shank and 6.3mm drive square. Tap size M12 with 9mm shank and 7.1mm drive square.