4Pcs Pneumatic Air Hammer Bits Smoothing Pneumatic Rivets Air Hammer Head With Spring For Hammering Operation 40JEOOTDTYechs: 100% brand new and high quality Made of high quality alloy steel materials, practical and durable. Oval and flat head surface for creating metal plates, rivets, punches and so on. Air smoothing 3x hammer bits + 1x spring, ideal for use in tire repair. It is suitable for automobile industry, car body, tire repair industry, construction, machine factory production line and so on. Specification: Material: Alloy Steel Type: 3x Hammers + 1x Spring Package Included: 3x Hammers1x Spring Note: 1. Please allow 1-3cm errors due to manual measurement, please make sure you do not mind before ordering. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item.