This 125mm (5”) Backing Pad is designed for use with MILWAUKEE's M18 FUEL™ 21mm Random Orbital Polisher. The hook & loop attachment method allows any hook & loop enabled polishing pad to be used with the backing pad, giving greater level of freedom in selecting your accessories. The durable rubber design aids in the dispersion of heat in applications which prolongs the life of the backing paditself, saving users both time and money. With a smaller diameter compared to the original 150mm pad included with the Random Orbital Polisher, users can access smaller spaces to thoroughly polish entire surfaces with ease.