Features: Solid structure and fine craftsmanships for precise projects in your endeavors. Crafted from metal with a coating, this kit features a stable 3 jaw design that ensures reliable performances. Antirust coating process, stable structure of three jaw. Fine workmanship, practical,excellent workmanship.Maximizes the service life. The fourth can be used for three-dimension of cylinders, elbows, and circle. Specifications: Diameter of clamping cylinders: 60mm/2.36in Minimum diameter of clamped cylinders: 4mm The length of the cylinders that can be clamped depends on the working length of machine. (Need to subtract the distance occupied by claw plate kit and the ejector pin kit) The shortest length of the cylinders that can be clamped depends on machine (Too short can cause the bladesto touch claw plate.) The reduction ratio of claw plate is 4:1 Center height: about 50mm/1.97in Total height: about 76.5mm/3.01in Package Includes: 1Set Rotary Module Kit note: Please allow 0-1cm error due to manual measurement. plese make sure do not mind before bid. Due to the differences between different monitors, the picture may not reflect the actual color. Thank you!