Backing plate for Rupes Bigfoot. The backing pad is made of polyurethane foam that is particularly resistant to mechanical stress. In combination with polishing foams, the backing plate creates a system that significantly reduces vibration. The holes in the backing plate create an air flow that dissipates heat and keeps the work surface at an acceptable temperature. The material used in the fastening system creates an effective anchoring system, giving the foam exceptional stability while the tool is in use. Backing Plate 3" (75mm). Includes M6 screw. Fits LHR75 & LHR75E