A foam backing plate, designed for use with Presta single-sided wool or foam buffing pads. A Hook & Loop backing plate, with a 14mm thread. Here at Slim's, we understand that the type of backing plate has a tremendous difference on your polishing regime in terms of comfort and control. And we really rate Presta's Rigid Backing plate as it offers a good level of comfort and control when used with a single-sided wool or foam buffing pad.