Coated abrasive sheet material with loop attachment means

A flexible coated abrasive sheet material comprising a layer of abrasive grains adhered in place by a layer of bonding resin and having a multiplicity of loops projecting from its side opposite the abrasive grains which sheet material is adapted to be held on the support surface of a pad from which project a multiplicity of hooks by releasable engagement between the loops and the hooks while the sheet is driven by the pad to abrade a workpiece, wherein said sheet material comprises a carrier web with a multiplicity of multifilament yarns stitched into it with portions of the yarns providing said loops, and an adhesive coating on the side of the carrier web opposite the loops to adhere the yarn to itself and to the carrier web.