Features [HOOK AND LOOP DESIGN] The backing pad is a hook and loop design, which can easily remove the disc without wearing the overall strength. [APPLICABLE MATERIALS] Can be used for most pad materials with hook and loop backing, such as foam, wool, paper, microfiber, etc. [MADE OF PU] The backing plate is made of PU material, soft texture, environmentally friendly and durable. [HIGH EFFICIENCY] The maximum operating speed is up to 12000RPM, which can withstand high frequency, fast and efficient. [STANDARD SIZES] With standard 5/16‑24 thread specifications and general size, suitable for most pneumatic sanders. Specification: Item Type: 5in Sanding Pad Material: PU Purpose: Used for polishing, finishing and sanding Color: Yellow Pad Size: 5in (manual measurement has an error of 1-3mm) Thread Specification: 5/16-24 Maximum Operating Speed: 12000RPM Package List:1 x Backing Pad Package List 1 x Backing Pad