The Trojan Jumbo Sponge is one of the largest sanding sponges available, which means you can comfortably sand for a longer period of time. The Trojan Jumbo Sponge combines sponge and abrasive technology to provide a versatile yet fast cutting and long lasting product. Suitable for surface preparation, between coat sanding, and ultra fine sanding, it can be used wet or dry, and on a variety of surfaces including drywall, paint, metal and plastic.