1. Features: A set of 4 pneumatic hammer drill bits, suitable for tire repair. 2. Oval surface design, can be used for forming metal sheets, rivets, etc. 3. Suitable for various hammering operations, such as ball joints and universal joints. 4. Can be installed on a pneumatic chisel/pneumatic hammer for use, durable and practical. 5. Suitable for industries like automotive, sheet metal, tire repair, construction, mechanical production lines, etc. 6. Pneumatic chisel bits: 125 mm (4 pieces). 7. Application: Suitable for general knocking - in and rust removal operations. 8. Suitable for operations such as painting, auto repair, hardware, ceramic lighting, stone processing, wall treatment (construction), carving, sanding, etc. 9. Material: Steel. 10. Color: Black - gray. 11. Packaging contents: 4 pneumatic chisel bits. 12. Only the above packaging contents are included, no other products are included. 13. Note: Light reflection and different displays may cause the color of the item to vary slightly from the actual product. The allowable measurement error is plus or minus 1 - 3 cm.