Stadea RBP102F Hook and Loop Rubber Backing Pad - 4" Rigid Back Holder/Backer Pad Hook and loop backing pad made with premium grade rubber, semi-flexible backer Rubber backing pad with premium quality for stronger bond with attachments Brass arbor with 5/8" 11 Thread Diameter 4" or 100 mm Max RPM 4200 Stone (Quartz, Granite, Marble, others) Counter <span class="a-text-bold">FlatSurface</span>Polishing Concrete Countertop<span class="a-text-bold">Flat Surface</span> Polishing Floor Polishing Counter Edges with Straight corners (Bevel or Similar) Counter Edges with Minor Curve Wet or Dry Polishing The Rubber material is soft and does not scratch polished surfaces when in contact. It can be used withor without water. The hook and loop attach the polishing or sanding pads. 4&#034; RigidRubber Backing Pad Stays flat on a surface under pressure - results into a flat surface without any bumps after polish The tough core provides adequate pressure on suchsurfaces Smooth Rubber does not leave scratches on surfaces when touches polishing vertical surfaces A high-quality value hook and loop backing pad for counter Longer Life of arbor Better Connection to tools Quick Change of Pads Adequate Bond with Polishing Pads Flat Countertop Surface Polishing Flat FloorSurface Polishing Profiles with Straight Edges (Bevel &amp; Similar) Profiles with a minor change in share (Demi, Bullnose, and Similar) 5/8&#034; 11 threaded durable brass arbor Center hole for water flow Side flat face to secure wrench Suitable forWet Polishing Can be used for Dry Polishing Rigid Rubber hook and loop pad Rigid core does not flex when pressed down hard Leaves the polished surface flat without any bumps Best for edges with straight lines Best for Bevel, Straight edge polishing For quick Change of Pads High-quality velcro for good bond and longer life Availablein 4&#034;, 5&#034; backing pads Great Value for the Price Durable Velcro Premium Rigid Rubber Body Brass Arbor Rigid paddesigned to polish flat surfaces, Floor, Countertops For polishing counter edges with straight lines and minor change in shape - Straight, Bevel, Demi,and other profiles with similar curves 4, 5&#034; Adequate height for easy release from grinder polisher Fits 5/8&#034; 11 male arbor Works great with Stadea SWP101K Wet Polisher Max RPM 4500