* Since an oil sump is installed, durability of parts is improved greatly. * The rod turns to the right so ythat it can drive anchor bolts cutting stones. Specifications of palm drill Piston diameter : 38mm Stroke : 32mm Overall length : 424mm Weight : 5.9 kg Number of blows : 3400bps Air Consumption : 0.85 ㎥/min Shank size : ¢19-H14.6×88 Inside diameter of hose : 12.7mm Hose adapter thread : G3/8