5pcs set air hammer bits, perfect for using in the tire repairing. Oval-shaped surface design, can be used to form metal plates, rivets, and so on. Suitable for any hammering operation, such as ball joints and u-joints. Can be installed on the air shovel/air to use. Durable and practical to use. Fit for automotive industry, sheet metal industry, tire repair industry, construction industry, machinery production line and so on Air Chisel Head: 175mm(5pcs) Application: Perfect for general knockin, rusting removal. Applicable to paint, auto repair, hardware, ceramic lighting, stone processing, wall treatment (construction), carving process, grinding and other operations. Type: Air Chisel Head color:Black gray Material:steel Package Contents: 1 x Air Chisel Head set(5 pcs) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.