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