1The product have industrial-grade quality, labor-saving and high-efficiency, stable performance 2Equipped with complete accurate accessories, which bring strong power, quality assurance 3This pneumatic air riveter is easy to operate, no other special requires needed 4Made of good quality alloy steel material, possess high strength, good corrosion resistance 5Riveting pull gun come with stable structure, excellent performance and long service life Item Type: Pneumatic Air Riveter Material: Alloy steel Model: KP-737B Free Speed: 1000rpm Working Pressure: 0.6-0.8MPA Working Range: M3/M4 Inlet Connector: 1/4 inch Size(LxW): Approx. 190 x 180mm / 7.5 x 7.1in Gun Head Diameter: Approx. 43mm / 1.7in 1 x Riveting Gun 1 x Wrench 1 x Hanging Ring 1 x Gun Tip 1 x Spacer 1 x User Manual It is not recommended to pull stainless steel nuts when it is not necessary.