3pcs Flat Head Hammer bits Tool and 1pcs Spherical Head Hammer bits Tool with Spring & 6pcs Pneumatic Rivet Hammer with Spring: Material:40RC steel & steel Hammer 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. Air Hammer Rivet tools Kit perfect for Hollow, solid, half-hollow Rivet. 6 PCS different head heavy duty Air Hammer Chisels tool,perfect to meet your different needs. Manufactured with Heat treated high carbon steel for necessary hardness and durability. colour:gray Material:40RC steel & steel Size:Length:116mm,116mm,116mm,116mm,116mm,110mm The length of the pneumatic hammer is:180mm,100mm,83mm,83mm Spring size is:28*26mm Package Contents: 3 * Flat Head Hammer bits Tool 1 * Spherical Head Hammer bits Tool 1 * Spring 6 * Pneumatic Rivet Hammer 1 * Spring Only the above package content, other products are not included. Note: Light 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.