TCP Global 5" DA Polisher & Sander Pad - Hook & Loop Face - Random Orbital Backing Plate Our 5" DA backing plate is a flexible backing plate ideal for all brands of Dual Action polishing machines Urethane is flexible and very durable; reinforced inner construction utilizes steel struts molded into the center hub to give the plate stability while maintaining a great even surface for pads Reinforced inner construction utilizes steel struts molded into the center hub to give the plate stability while maintaining a great even surface for pads Quick and easy disc changes with micro hook and loop attachment system Fits all DA Polishers with 5/16" diameter shaft