Product Description Our products are produced according to 6480-2002<> to make, also we have approved ISO9001:2008 Quality System. 1) Taper Connection: 6° 7° 11°12°. 2) Bit Diameter: 30-42mm. 3) Top class quality & competitive price available. Packing: wooden case or plastic box or as per your own requests. We can supply all kinds of rock drilling tools, bits and related products, the product mainly used in coaling ,metaling, quarrying, mining, construction and so on. Meanwhile, we could start production according to your supplied samples completely. Cross Bits: 1.Tapered connection; 6°. 7°. 11°. 12°. 2.Threaded connection; R22.R25.R28.R32.R38.T38.T45.T51. 3.Packing; wooden case or plastic box or as per your own requests. 4.Diameter; 36mm.38mm.40mm.42mm.50mm.60mm.65mm.76mm.89mm. The cross bits are made from alloy steel. They are widely used in metallurgy mine, geological exploration,traffic tunneling, quarrying and so on. We can design and produce different drilling bits according to customers' requirements. Button Bits: Used in coal mining, metal mining, and stoning, road construction. All the products have assured by China People Insurance Company. Features: 1) Thread connection: R22, R25, R28, R32, R38, T38, T45, T51. 2) Steel material: 45CrNiMoV. 3) Suitable carbide tips. 4) Bits diameter: 30-127mm.