6 (150mm) Backing Pad/DiscsPLEASE NOTE There are two types of backing pads. This is a dual action (DA) backing pad and can only be used with machines that accept this thread (5/16 24 UNF male). Please make sure that this is the correct baking pad for your machine. Overview: This quality backing pad is designed to be used with Hook and Loop sponges, bonnets, sanding discs and is also compatible with air sander polishers. This backing pad has a diameter of 150mm. The firm backing pad with a semi-flexible edge also has 8 holes for dust extraction. This backing pad can handle a maximum speed of 10,000 RPM and features 5/16 24 UNF male threads. Hook and Loop (VELCRO)This is a general from of backing plate, which attaches to your machines spindle, and can be easily changed from one machine to another. The Hook and Loop locks into place with your Hook and Loop discs, which is a common type of sanding/polishing pads. Dual Action (DA) Our backing pads have a small stud which connects them to your machine by threading into your machine such as a polisher. This is known as a DA Hook and Loop backing pad. Not sure what size pad you require? When fitted the disc onto your backing pad there should be a slight lip around the edges, meaning the backing plate should be smaller than the pad. Size Guide: 3 Backing Plate is ideal for 3.54.5 Pads5 Backing Plate is ideal for 5.56.5 Pads6 Backing Plate is idea for 6.57.5 Pads Please note The latter will be less efficient but does have a better safety margin. Further Information : We sell various sized backing plates and pads, please search or shop. If any further help is required, please feel free to get I touch. Loops 6" (150mm) Dual Action Hook & Loop Backing Pad Orbital Sanding/Polish Disc Plate