Sanding disc suitable for random sander with a diameter of 125mm sanding disc. Make of technical , highly temperature resistance, durability. This effective 8 hole sanding plate can be used with a grinder with a collection systems. 8 collection holes can suck and dirt into the entire bag, reducing the load on the body. : If the replacement pad needs to be replaced, simply remove 4 screws that hold the pad on grinder and replace it with a new.