Open-arm hold-down clamps offer maximum flexibility and adjustability. Two flanged washers hold the spindle in place anywhere along the arm by tightening the jam nuts.
Solid-arm hold-down clamps are easily customized to a particular application. Using the weld-on bolt retainer, you can locate the spindle permanently in one place. The solid-arm version allows mounting the spindle at an angle, or shortening the clamping arm.