Description:YG8 hardness alloy drill bit, well abrasive resistanceDeep groove chip removal more smoothlyTriangle handle design for avoiding droppingCompatible with electric hand drill, Lithium electric drill and bench drilling machineApplication: ceramic tile, concrete, iron, copper, plastic, wood board, etcSpecification:Color: goldenMaterial: hard alloySize Chart:6mm(1/4 inch):Drill bit diameter: 6mmCutter length: 54mm/2

12 inchShank diameter: 4mm/0

15 inchDrill total length: 100mm/4 inch8mm(1/3 inch):Drill bit diameter: 8mmCutter length: 66mm/2

59 inchShank diameter: 6mm/0

23 inchDrill total length: 113mm/4

44 inch10mm(2/5 inch):Drill bit diameter: 10mmCutter length: 71mm/2

79 inchShank diameter: 7mm/0

27 inchDrill total length: 118mm/4

64 inch12mm(1/2 inch):Drill bit diameter: 12mmCutter length: 70mm/2

75 inchShank diameter: 9mm/0

35 inchDrill total length: 120mm/4

72 inchPackage Includes:10 piece twist drill bit