Lever Throttle Micro Needle Scaler. Very powerful for its size. This needle scaler is ideal for cleaning contoured surfaces in small, confined, and hard-to-reach areas. Removes rust, paint or slag from metal surfaces. Lever throttle offers easy, accurate control of descaling action. Used for scaling in auto shops, steel mills and foundries. Can also be used to remove heavy rust. Includes set of 12 pcs, 3mm needles.