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Description:1.0-8mm High-speed Steel Center Drill Bit Countersink Metalworking Spiral Position Hole Drill Hole Cutter Drilling Hand ToolSpecifications:Product NameSpiral grooving center drill bitMaterialHigh speed steelColorBlackTypeA:1mm B: 1.5mmC: 2mmD: 2.5mmE:3mmF: 3.5mmG: 4mmH: 5mmI: 6mmJ: 8mmPu..

Description:M35 Cobalt-containing Super-hard Double-edged Punching And All-grinding Double-head Spiral DrillSpecification:Produce NameDouble-head Spiral DrillMaterialM35ApplicationDrilling and punchingFull length46.8-66mmBlade length10-16mmDiameter3-6mmSpecificationFull lengthBlade lengthDiameter3mm..