Diablo's premium Comfort-Grip? hand sanding block with random orbital sanding (ROS) discs includes break through innovation to improve comfort, increase control, and extend sanding life in a variety of sanding applications. Featuring a premium durable foam, the Comfort-Grip? ergonomic design fits comfortably in any size hand allowing for extended use and superior sanding control. A three-sided sanding block design enables the sanding disc to wrap around the bottom and both sides for sanding hard-to-reach areas. The hook Lock? backed block and sanding discs include a premium ceramic grain blend to remove material faster and offer longer sanding life than standard sanding discs. Clog-SHIELD?, Diablo's own blend of grinding agents, reduces loading thus maximizing productivity. The great grain bonding system, ENDURA-BOND?, provides Diablo's sanding discs with longer life and extreme durability.