This is a premium 120 grit sanding belt that can be used various drum sanders as a conveyor feeding belt. While the grit is not really important, it is simply to be able to grab the material you are sanding and move it through the sander, similar to grip tape on a skateboard if you will. These drum sander conveyor belts are fantastic for replacement belts because they are much more cost effective than the typical feeder belts from the manufacturer and much more durable due to their heavy duty polyester cloth backing. These belts can be ran bi-directionally on your drum sander machine.A Grizzly G0458 drum sander takes an 18" x 44-1/2" feed belt. We make our drum sander feed belts using a durable, heavy duty backing.