General description Heavy cast iron construction ensures durability and stability, while the steel screws provide a smooth sliding motion. The removable steel jaws securely hold wood, metal, and other materials, allowing for accurate drilling. Technical specifications Size: 4 inches (100 mm) Material: Cast iron with steel screws Compatibility and accessories Compatible with milling machines and drill presses Ideal for machine maintenance, carvers, and jewelry making Usage Secures materials for precise drilling Slotted base allows easy positioning on drill press tables