Diamond sanding block - 3M

The hard foam hand blocks are coated with flexible diamond sanding material. They are used for burr removing, to break edges and for grinding small surfaces on materials such as glass, ceramics, natural stone, hard metal, coatings and fibreglass. In addition, spraying flags and sprue marks can be removed from rubber and plastic parts.

In general, diamond sanding tools should be used in combination with a cooling agent (water). The sanding blocks are suitable to break glass edges as well - even that of single-pane safety glass, since the outer 2-3 mm are not hardened.