For quick clamping, insert in diameter 5/8. Mount the bracket on the right angle, stirrup or clamping brackets to push down at an elevated height for larger workpieces. The patented rear crank allows clamping pressure adjustment while the clamp is in locked position. Use the crank handle to preset the clamp opening on repeated clamping applications. Clamp the optional top V pads onto the top spindle to clamp round or angled bearings. Inserta pliers are an excellent choice for easy locking and quick release clamps.