Lock a shaft quickly without the use of tools or handles. These quick shaft locking clamps are designed to positively lock a shaft quickly without the use of tools or handles. Ideal for applications where frequent position adjustments are made or space is limited. As the handle is pushed down, a locking block clamps the shaft into position. As the handle is released, a spring releases the locking block allowing the shaft to move freely. Shaft tolerance h9. Both faces and two sides can be used for installation allowing for multiple mounting configurations. The body and handle are made from die cast zinc with chrome plating. The internal locking block is brass.