This clamping extension arm is used with the standard hold down Snap Clamp. The arm extends the clamping point further from the clamp. The extension arm includes two setscrews to attach the arm to the clamp. The arm can be mounted to the top or bottom of the Snap Clamp depending on the application. Made from 1045 alloy steel with a black oxide finish. Note: Using these clamp extension arms will reduce holding force by 25% - 30% of the stated clamping force.