Specification Brand : Dremel BulletPoint : Sold on Amazon BulletPoint1 : 20pcs HP Tungsten Carbide Cutter Kit Burs Lab Drill Polisher BulletPoint2 : Great for grinding both metals (i.e. copper, aluminum, etc.) and non-metallic materials (marble, jade, plaster, etc.) BulletPoint3 : Processing is high quality and smoothness and can be all sorts of high-precision shape BulletPoint4 : HRA processing hardness = up to 80. The diameter of burs is 2.35mm. The total length is 4.8cm. BulletPoint5 : Extremely durable - Lasts up to 10X longer than than high-speed steel cutting tools, and 200 times longer than wheels. Safe, reliable and convenient to use ConstructionType : Cut-off Wheels ExternallyAssignedProductIdentifier : 6912011532156 ExternallyAssignedProductIdentifier1 : 0636123501096 ExternallyAssignedProductIdentifier2 : 636123501096 IncludedComponents : bare-tool ItemName : 1-1/4"Dia. Super Duty Cutoff Wheel Fiberglass, Sold As 1 Package, 5 Each Per Package ItemPackageQuantity : 5 ItemTypeKeyword : power-rotary-tools Manufacturer : Bosch/Skill Material : Fiberglass PartNumber : PLX50109 ProductDescription : Dremel Fiberglass Reinforced Cut-Off Wheels ProductSiteLaunchDate : 2015-05-22T17:53:34.473Z