Product description Features:1.Whole heat treatment, HRC 48-50, high hardness.2.The drill core is lengthened,high concentricity.3.Cooperate with the square tenon machine.4.The cylindrical diameter of the clamping part is 19 mm.6.Application: used for woodworking punching.Descriptions:1.This is Square Hole Mortiser Drill Bit,safety and durable.2.This Mortising Chisel is great for drilling square holes in wood with a mortising machine or a mortising attachment.Specifications:Type:1/4"(6.35mm),5/16"(7.94mm),3/8"(9.5mm),1/2"(12.7mm)Color:SilverMaterial: 50# steelWeight:1/4"(6.35mm) -135g5/16"(7.94mm)-140g3/8"(9.5mm)-160g1/2"(12.7mm)-215gQuantity:4pcsPackage included:4 x Square Hole Mortiser Drill BitNoted:1.Please allow 1-2mm errors due to manual measurement.2.Item color displayed in photos may be showing slightly different on your computer monitor since monitors are not calibrated same. Safety Warning 1.Don't put it beside the high temperature condition. 2.Don't throw it into fire. 879.Don't throw it into water.
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