SHANDIKE Tapered Drilling Tools(Small hole rock drilling tools)- are mainly used with hand-held, air-leg, and rail-type pneumatic rock drills for shallow-hole rock drilling, small-diameter blast hole rock drilling in mining, stone quarrying, etc. The main small hole rock drilling tools are tapered drilling tools, integral drill rods, plug hole rods, shank end rods.For example H19,H22,R25,R28 tapered drill rods and bits.