Specification:Aperture: 6/8/10/12mmMaterial: DiamondHandle: 6.35mm hexagonal handleDiamond length: 10mmColour: BlackApplication: For drilling granite and marble, masonry, concrete, tiles/ceramics, glass, hard plastics...feature:Waxed and cooled inside, dry drilling requires no water.Efficient and versatile drilling.Long drilling life.Notice:When using a brazed diamond hole saw, the speed of the power tool should not be less than 2,000 rpm, and the faster the speed, the better the effect. Do not press down too hard on the hole saw, otherwise it may be damaged.Package includes:1 drill bit/4 drill bitsnotes:Please allow slight errors due to manual measurement.Colors may vary slightly on different monitor displays.