"The Klutch Composite Pistol-Grip Air Needle Scaler is engineered to deliver maximum quality, durability and performance. Klutch technology offers advantages such as lightweight composite housing for exceptional comfort and control, 19 steel needles for effective scaling action, and trigger control, all providing better efficiency and productivity. Operating PSI 90, Needle Length in. 7, Stroke Length in. 1.378, Case Included No, Needle Diameter in. 1/8, Needles qty. 19, Air Inlet Size in. NPT 1/4, Blows Per Minute BPM 4,000, Min. Hose Size in. 3/8, Air Consumption CFM 11, Bore Diameter in. 0.748. Removes rust and paint 19 needles operate at 4000 BPM Lightweight, comfortable composite body Trigger control"