Vaper 19750 1/4-Inch NPT Air Hammer features an air inlet size of 1/4-Inch NPT. The suggested air hose size is 3/8-Inch and suggested air pressure is 90 psi. Average air consumption is 2.8 cfm. Blows per minute is 4,500 bpm. Stroke size is 1.77-Inch (45mm). Air hammer features a hardened steel barrel and piston for less wear and longer life and lightweight aluminum pistol-grip housing. Front exhaust blows debris away from work area. Ideal for cutting, chipping, and scraping. Includes (4) of the most popular sized chisels.