SENYO- OZ Spring Collets 1)Material: steel, high precision 2)Suitable for boring machine, milling machine, drilling mach 1) Steel material2) High clamping ability and precision of 0.02mm3) Suitable for boring machine, milling machine, drilling machine.4) Inventory:100sets/weekTaperCat NoOZ-326.8.10.12.16.20.25MM3.4.5.7.9.11.13.18MMOZ-251/8",3/16",1/4",5/16"3/8" 5/8" 11/16" 7/8" OZ Spring Collets