GP15901 Hook and Loop Hand Sanding Block, Hand Sanding Pad / Size : 3 x 5 inch Pad Size : 3 inch x 5 inch Hook and Loop Fastener (Velcro Type) Made from Soft PUR, excellent to use on flat or curved surface, Formed hand sanding block for use with any velcro sanding, abrasive or polishing discs Durable construction with finger grooves for enhanced comfort.