... tools,drill bit,drill bits,rock drilling tools 1. Button bits: Tapered button bits (28mm, 30mm 32mm, 34mm, 36mm, 40mm ... different hammer, for example: DHD Hammers series (DHD340, DHD350, DHD360, DHD380 ets. ) , Cop Hammers series (Cop34, Cop44, Cop54 etc.) , ... HD hammer series, Mach hammer series (MACH30, MACH40, MACH50, MACH60 etc) ...