4pcs set air hammer bits, perfect for using in the tire repairing. Oval-shaped surface design, can be used to form metal plates, rivets, knock out and so on. Suitable for any hammering operation, such as ball joints and u-joints. Can be installed on the air shovel/air hammerhead 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.