Neiko 30267A Flex-Edge Hook and Loop Backing Pad, 6-Inch | 10,000 RPM High quality polyurethane material construction used for variety of applications tailored to be either rigid or flexible but never stiff Universal standard backing pad size 6" x 5/16" with 24 threads is durable and fits most air sanders in woodworking, garages, or industrial settings Hook and loop function provides easy closure for removing disc without wearing out overall strength Unique tapered edge has a 29-degree flexibility for perfect detailing on contoured surfaces Fast and durable oscillating speed operates at 10,000 RPM withstanding high frequency to achieve a consistent, smooth finish