[Quality Material] The diamond tip is made of high quality fine grain hard alloy. The grain is uniform, durable and wear resistant and can be used for finishing various metal mold cavities.[Various Shape Bits] 3 Sets of 30 Assorted Diamond Cutters will provide you with a variety of standard shaping options of different sizes: Ball / Cone / Spherical Top Cone / Cylinder / Tapered Point / Needle.[Suitable for multiple materials] Professional 120 grit assorted diamond burrs. It is ideal for filing ceramic, granite, tile, glass, gold, metal, plastic, platinum, silver, stone, jewelry, wood and anything with a hard surface .[Wide range of applications] The diamond grinding wheel can improve machining quality, efficiency and finish. Operation is simple, convenient, safe and reliable. Diamond bur on 3mm diameter shank, compatible with most Dremel, GMC and Silverline rotary tools.[Note] It is recommended to use water as a lubricant when using these cutters to prevent dust splashing. The kit comes with compact storage cases to organize, store and transport the diamond burs.