Tungsten carbide mining drill thread cross bit for hole openingSpecifications of thread cross bit Product nameDiameterTip sizeThreadmminchThread cross bit45mm1 3/47x8R3250mm1 31/32R3255mm2 1/8R38/T3860mm2 3/8R32/R38/T3865mm2 1/2R32/R38/T3870mm2 3/4R32/T3880mm3 1/8R32100mm3 3/4R32 We also supply thre