1. Advantages: Rust-resistant coating process stable three-jaw chuck structure fine workmanship sturdy and practical jaws excellent craftsmanship for maximizing the lifespan.2. Applications: The fourth axis can be used for the three-dimensional processing of cylinders bent pipes and circles. The fourth-axis engraving machine can be used for carving spirals scars bamboo joints etc.Maximum clamping diameter for round cylinders: 60mmMinimum clamping diameter for round cylinders: 4mmMaximum clamping length for round cylinders: Depending on the machine's working length. (Distance occupied by the chuck kit and top pin kit needs to be subtracted.)Minimum clamping length for round cylinders: Depending on the machine's tool head.