Offering diamond mounted points with following specification: * 2. 34mm shank - These small engraving cutters are ideal for power engraving intricate detais in wood, fiber, plastic and sofe materials.* 3. 0mm shank - Smooth cutting surface, high drilling speed. Used for precision grinding of small holes in carbide, ceramics, sapphires, glass and exra hard alloys.* 6. 0mm shank - Mounted points & wheels can be used on a wide range of pneumatics, electric and flexible drive tools.