The flexible sanding block is adjustable for any concave or convex shape. The handle enables a flexible, ergonomic grip to give complete control over the sanding process. Mirka® Hand Sanding Blocks are designed for use with Mirka’s revolutionary Net sanding abrasives, although they can be used with other grip abrasives. To ensure dust-free sanding, the hand sanding block simply needs to be connected by hose to a dust extraction system.