4pcs 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 factory production line and so on. Air Hammer Head-4pcs: Size: 25 x 180 mm(1pc),30 x 100mm(1pc),35 x 80mm(2pcs) 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. color:Black gray Material:steel Package Contents: 1 set x Air Hammer Head(4pcs) 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 picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.