General Purpose Floor Locks used with 8" Caster Size. Floor locks may be used on platform trucks, fixture dollies, or equipment with casters. Simple foot pressure immobilizes equipment. Locks when large friction face is pressed against the floor. To release simply kick release rod. Brake is independent of casters and can be installed to any convenient location on the cart. Specs: mounting height 9 15/16"; retracted height 8 7/8"