. The model TX-1B needle scaler is a convertible tool used as a chisel scaler or a needle scaler depending on the application. Needle scaler can be easily converted to a chisel scaler by replacing needle attachment with chisel. . Needle scalers adjust to any surface contour automatically. . Tool applications: . De-rusting and cleaning of metals. . Peening of welded joints. . Cleaning castings. . Cleaning welding slag. . Removing barnacles. . Removing paint, rust and dirt. . Chipping stone, concrete and brick.