"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. Needle Length in. 7, Air Consumption CFM 11, Needles qty. 19, Stroke Length in. 1.378, Case Included No, Blows Per Minute BPM 4,000, Operating PSI 90, Min. Hose Size in. 3/8, Needle Diameter in. 1/8, Bore Diameter in. 0.748, Air Inlet Size in. NPT 1/4. Removes rust and paint 19 needles operate at 4000 BPM Lightweight, comfortable composite body Trigger control"