Sealey 145mm DA Dust-Free Backing Pad for Hook-and-Loop Discs 5/16"UNF Features: Suitable for air and electric tools fitted with 5/16"UNF threads. Technical Details: • Suitable for air and electric tools fitted with 5/16"UNF thread. • Compatible with Ø150mm hook-and-loop discs. • Model No. PTC150DFV • Model No. PTC150DFV Additional Information: • Suitable for air and electric tools fitted with 5/16"UNF thread. • Compatible with Ø150mm hook-and loop discs.