Features: Adopt high quality movement, precision manufacturing and stable performance Precision high-pressure vacuum cast aluminum alloy body, wear-resistant. Strengthen alloy cylinder with large storage capacity and strong strength. Strong force spring, full of elasticity, effectively slowing down vibration Alloy chisel, high hardness, wear resistance, various head design, various functions Application: casting cleaning and beveling before welding, removal of welding slag after welding, leveling welding spot scarring;To correct the opening between stone, concrete and brick walls. Specification: Number of Blow: 3000rpm Air consumption: 114L/min Working pressure: 6-8kg Speed adjustment: speed adjustment knob Cylinder stroke: 85mm Intake screw: 1/4" Chisel shank shape: round Shank hole: 10 mm/0.4in Inner diameter of air duct: 3/8" Chisel Length : 175mm/6.9in Air hammer size: 250*150mm/9.8*5.9in Weight: Approx.2700g/95.2oz Package list: 1 *Air Hammer 5 * chisel 1* Hammer head 1 * inlet connector 1 * spring .