7 degree rock drill bit

Taper 30mm 34mm 36mm 38mm 40mm Dth Drilling Bit Mining Use Tapered Rock Tools Taper button bit as small hole bit is different with thread button bit as it use taper match bit with rod to be used for air leg or hand held jack hammer driller in quarrying and mining. Description : (1) Connect shank Size: 19, 22, 25 at most (2) Bit Diameter:Diameter 32mm,34mm,36mm, 38mm,40mm (3) Tapered connection: 6 degree, 7 degree, 11 degree, 12 degree etc. (4) MaterialAlloy Steel Bar