... 40mm, 42mm, 44mm and so on with different degree taper) Thread Button Bits (33mm, 35mm, 45mm to 89mm ... , 102mm and so different degree Thread for example: R22, R25, R28, R32, R38 ... T45, T51 etc.) Retrac Button bits with different Thread different diameters. 2. Dth bits: From 115mm, ... 7, 11, 12 degree taper) , Length can be according to customers requests. 5 Thread Drill RodR22, R25, R28 ...