5pcs Air Hammer Chisel Set Pneumatic Hammer Bit Set for 150/190/250 Air Hammer Features: Made of premium chromium molybdenum steel, high hardness and long service life.  5 kinds of different shape air hammer chisel, provided the needs of different jobs. Excellent quality air hammer chisel, it can used with a pneumatic tool. Ideal for masonry and concrete demolition, hard surface break up, chiseling and removing welding spots, rust, hardware cutting, drilling and so on. Universal size, 10cm/0.4in  round shank chisels are suitable for 150/190/250 air hammer. Specification: Material: Chromium molybdenum steel Weight: Approx.474g/ 16.7oz Length: Approx.125mm/ 4.9in Shank Dia.: 10mm/0.4in Package List: 5 * Air Hammer Chisel Note: Please allow slight error due to manual measurement. Thanks for your understanding.