Unlike the smooth and flat edges of standard fixture clamps, these clamps have ridges that bite into parts, making them good for gripping castings and rough-cut stock.

Install these clamps into a slot in your fixture to grip at the bottom of a workpiece edge, giving the cutting tool maximum access.

Machine these fixture clamps to match the contours of your workpieces for a stronger grip. Place the clamp between the two workpieces in a fixture and tighten the screw to extend the sides of the clamp, creating a secure hold against both workpieces.

Secure a workpiece from the inside, leaving the outside clear for machining.