[Quality material] The diamond burr is made of high quality fine grit hard alloy. The grit is uniform, durable and wear resistant and can be used for finishing various metal mold cavities. [Tip of Various Shapes] 3 sets of 30 assorted diamond burs will provide you with a variety of standard forming options of various sizes: round / cone / spherical top cone / cylinder / tapered tip / needle. [Suitable for multiple materials] Professional 120 grit diamond burs. It is ideal for filing ceramic, granite, glass, gold, metal, plastic, platinum, rock carbide, silver, stone, tile, wood and anything that has a hard surface. [Wide range of applications] The diamond bits can improve the quality, efficiency and finish of machining. The use is simple, convenient, safe and reliable. Diamond bur with 3mm diameter rod, compatible with most Dremel, GMC and Silverline rotary tools. [Note] It is recommended to use water as a lubricant when using these burrs to prevent splashing of dust. The kit comes with compact storage boxes for organizing, storing and transporting. Specification Burr material: Cemented Carbide Shank material: stainless steel Color: silver Shank diameter: 3 mm Package Includes Diamond burr x90