1/4" Pistol Grip Internal Adjust Screwdriver has a free speed of 1,800rpm and features a pistol grip design. It is fully reversible with a quick change bit retainer. Neoprene sleeve grip and tension springs are included (Astro Pneumatic 810T). It also features an Internal adjustable clutch (turning clockwise compresses spring increasing torque, counter clockwise release). The specifications are as follows: Retainer Capacity: 1/4" Hex, Free Speed: 1,800rpm, Overall Length: 8-1/8" (206mm), Net Weight: 3lbs. (1.36kg), 810P Torque: 115in./lbs., Torque Range: 20-115in./lbs., Air Inlet Thread NPT: 1/4", Air Hose I.D. Size: 3/8" (10mm), Avg. Air Consumption.: 6cfm and Air Pressure: 90-120psi.