Feature Highlights: 1. Versatile Repair Kit – Designed for tasks like tire repair, wind pipe pressure seam edging, and more. These hammer bits are practical tools for various pneumatic sewing machine applications. 2. Pneumatic-Powered Use – Simply install the bit into a pneumatic sewing machine and connect it to an air compressor for immediate operation. 3. Durable Steel Construction – Made from sturdy steel in a gray finish, built to withstand frequent use and deliver reliable performance. 4. Multiple Size Options – Includes hammer bits in lengths of 180mm, 100mm, 83mm, and 83mm, along with a spring sized at 2826mm, offering flexibility for different tasks. 5. Complete Tool Set – The package contains 3 flat head hammer bits, 1 spherical head hammer bit, and 1 spring—everything you need to get started. Product Details: This 5-piece pneumatic hammer chisel bit set is built for durability and ease of use. Made from solid steel, it works with pneumatic sewing machines to handle jobs like tire repairs and seam edging. The bits are quick to install and ready to use once connected to an air compressor. With multiple bit lengths and a included spring, this set provides a practical solution for your repair and maintenance needs. Specifications: - Material: Steel - Color: Gray - Hammer Bit Lengths: 180mm, 100mm, 83mm, 83mm - Spring Size: 2826mm - Package Contents: 3 x Flat Head Hammer Bits, 1 x Spherical Head Hammer Bit, 1 x Spring Note: Slight color variations may occur due to lighting and screen differences. Measurements may have a tolerance of +/- 1-3cm. Only the items listed above are included in the package.