The PRO-TEK's 9102-LN series pneumatic hammers feature 3,200 impacts/min, 2-5/8" (6.5 cm) stroke, 0.4" (1 cm) chisel shank opening, 1/4" NPT air inlet, 90 PSI air pressure, air consumption of 4 CFM, 11" (28 cm) length and weight of 2 kg (4.4 lbs). They are easy to use, and are a common choice for field applications.