Specification Brand : KingBra BulletPoint1 : Made of high-speed steel. Heat treatment, HRC48~50, high hardness, lengthened core, high concentricity BulletPoint2 : Great for drilling square holes in wood with a mortising machine or a mortising attachment BulletPoint3 : Fits all mortising machines and drill press attachments. Square hole drill is mainly used for woodworking aspects BulletPoint4 : It will get double effect by matched use with mortise and tenon machine.The square hole punching needs to use electric drill, hammer & other tools BulletPoint5 : Reduce labor intensity of construction workers, speed up the construction speed, reduce construction costs for construction, installation, renovation, decoration industries ExternallyAssignedProductIdentifier : 8414745195471 ExternallyAssignedProductIdentifier1 : 726858976495 ExternallyAssignedProductIdentifier2 : 0726858976495 ExternallyAssignedProductIdentifier3 : 00769053052458 FinishType : Finished GpsrSafetyAttestation : 1 ItemName : Square Hole Drill Bit Woodworking Mortiser Drill Bit Steel Hardness Mortising Chisel Set 3/4inch 19mm ItemPackageDimensions_Height : 21.6 centimeters ItemPackageDimensions_Length : 5.3 centimeters ItemPackageDimensions_Width : 16.7 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : wood-drill-bit-sets Manufacturer : KingBar Material : High Speed Steel Material1 : High Speed Steel Material2 : Alloy Steel Material3 : Brass ModelNumber : KingBra NumberOfFlutes : 2 NumberOfItems : 1 PartNumber : 5001-1020 ProductDescription : Features: Professional wood drill bit, suitable for construction, installation, renovation, decoration industry, etc. Special steel, heat treatment, HRC48~50, high hardness, lengthened core, high concentricity. It will get double effect by matched use with mortise and tenon machine, the square hole punching needs to use electric drill, hammer & other tools. This quality set also comes with a convenient plastic storage case.