Our grinding cup can be used for grinding 7mm-25mm button size. Other sizes available on request.
Taper button bit as small hole bit is different with thread button bit as long hole bit to use taper
Thread Button Bits: Thread sizes:R25,R28,R32,R35,R38,T38,T45,T51,ST58,ST60,GT60 Head diameters:33m
Company: Hubei Superdrill Equipment Co.,Ltd
Add: Building 3, Rainbow road,No.188 ; wuhan ;Hubei province