bits tools kit use for tire repair,wind pipe pressure seam edge and so on.The bit installed in the Pneumatic sewing machine,need to connect the air compressor to use.color:grey Material:steelThe length of the pneumatic hammer is:180mm,100mm,83mm,83mm size is:28*26mmPackage Contents:3 PCS * Flat bits Tool 1 PCS * Spherical bits Tool 1 PCS * the above package content, products are not included.Note: shooting 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. About Shipping: All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances.Any questions, please feel free to contact us During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 24 hours, wish you a happy shopping Thanks for your cooperation and we'll make you feel satisfied.