This helps make swapping hook and loop sandpaper discs rapid and easy, to prevent downtime. Please note, In the event your sander doesn't have a compatible hook & loop backing, a backing pad is necessary for use, which we sell separately. If It is round, spins and sands, you'll find https://www.hukums.com/products/hukums-60a-24v-automotive-or-commercial-multi-battery-charger-fc6024