... bitTapered button bit(28mm, 30mm, 32mm, 33mm, 34mm, 36mm, 38mm, 40mm, 42mm, 44mm and so on. With different degree taper) Tapered ... Button BitThread button bit (33mm, 35mm, 45mm, 51mm, 57mm, 64mm, 70mm, 76mm, 89mm, 102mm, 115mm, 127mm and so on. R25--38mm ... .init( { 'aImgSrc': aBigImageSrc } ); } )(); Button bits for Rock drilling 34mm/ 38mm/ 40mm/ 43mm etc