DUAL CLUTCH ADJUSTABLE ARM: the cast iron arm features two clutch plates to grip the serrated steel rail. This design holds the arm in place for better clamping pressure; the swivel jaw pad is built to grip various shapes. The plastic cap is used to prevent damage to delicate projects., TECHNICAL SPECS: Jaw Opening: 12.0″ ; Throat Depth: 2.5” ; Forged Steel Body; 3/4″ x 1/4″ Serrated Steel Rail; 3/4″ Screw Travel; Medium Duty F-Clamp, COMFORT GRIP HANDLE: The ergonomic plastic main handle is easier to use than traditional wood handles, and it provides more torque for better gripping power., HOW TO USE: Make sure vise is securely mounted to the workbench and the swivel base lock is secure. Open the vise by turning the vise handle counterclockwise. Place item between the serrated jaws. Close the vise by turning the vise handle clockwise until the item is snug in the serrated jaws, continue to tighten until you can no longer move item. Don’t over tighten as this may damage item and or the vise. When finished working on the item, turn screw handle counterclockwise to release the item., YOST VISES QUALITY: Every Yost Vises tool is engineered to have high standards of quality, strength, and durability. We value quality over quantity and manufacture products that are safe and easy to use. We offer lifetime tech support to back our quality guarantee., SAFETY INFORMATION: Misuse of vises can cause serious injury to eyes, hands and or other body parts. Vises must be set up and used properly. Before setup and use, read, understand, and follow all instructions outlined in the manual., WARRANTY: Comes with a 1-year limited warranty and 90-day return.