[Quality Material] The diamond tip is made of high-quality fine-grained hard alloy.The grain is uniform, durable and wear-resistant and can be used for finishing various metal mold cavities.[Various Shapes Bits] 3 Sets of 30 assorted diamond burs will provide you with a variety of standard forming options in different sizes: ball/cone/spherical top cone/cylinder/taper tip/needle.[Suitable for multiple materials] Professional 120 grit diamond burs assorted.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] Diamond grinding wheel can improve machining quality, efficiency and finish.Use is simple, practical, safe and reliable.Diamond bur on 3mm diameter shank, compatible with most 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 diamond cutters.