The thick foam cushion of these Mirka hook and loop backed interface pads will allow better sanding of contoured surfaces and will also help to extend the life of the backing pad on your random orbit sander. The multi-hole configuration allows fitting to many different makes of sander. They are fitted between the sanding pad and the abrasive disc minimising wear of the sanding pad, simply peel off and discard when it eventually becomes worn. When using Abranet® abrasive discs with many random orbit sanders, a more positive attachment to the sanding pad can be obtained with the use of these discs. Available either as singles or in packs of five in 125mm (44 hole) and 150mm (67 hole) diameters 10mm thick.