... in producing of varies type of button bits in different size in China for many years. Including of tapered button bit, retract button ... , 34mm, 36mm, 38mm, 40mm, 42mm, 44mm and so on. With different degree taper) Tapered Rod (Rod 19mm, 22mm, 25mm; Shank hex ... --115mm, T51--127mm Please feel free to contact with us for more detailed specifications or catalog. ( function(){ var aBigImageSrc = [ 'http:// ...