Specification Brand : Luo ke BulletPoint1 : Round cup burs are made of the premium Vanadium steel for long life and accuracy BulletPoint2 : This burr set includes 6 pieces, diameter of the burr are 1 mm BulletPoint3 : Specific 3/32 inch ( 2.35 mm ) shank fits for electric rotary tool, drill, grinder, etc BulletPoint4 : For carving of silver, jewelry, wood, walnut,olive core, beads, precious soft metal and more BulletPoint5 : Ship with strong plastic storage box, easy to carry and store Color : 6 Pcs 1mm Round Cup Burs IncludedComponents : 6 pieces 3/32'' shank wire rounder burs(1mm) ItemName : Luo ke 6 Pcs 1mm Round Cup Burr - 3/32'' Shank Wire Rounder Bits Jewelry Burs for Lapidary Making ItemPackageDimensions_Height : 9.1948 centimeters ItemPackageDimensions_Length : 1.397 centimeters ItemPackageDimensions_Width : 6.2992 centimeters ItemTypeKeyword : cutting-burrs Manufacturer : Luo ke Material : Vanadium steel ModelName : 1mm Round cup burr ModelNumber : 1mm Round cup burr NumberOfBoxes : 1 PartNumber : 1 mm Round Cup Burs ProductDescription : Made of premium tungsten steel with high hardness, hard-wearing and anti-rust. Can be used in hanging mills, bench mills,electric grinders, rotary tool, etc. Suitable for carving and grinding of silver, jewelry, wood, walnut and more, recommended for olive core, beads, ivory, wood, bone, precious soft metal , etc.