Specification Brand : ATOPLEE BulletPoint1 : [NOTE]Square hole drills need to be used with square hole drilling machines (square tenoning machines). The square hole drill bit is composed of a center drill core bit and a sharp outer drill sleeve. Using this drill bit (installed on a square tenon machine) to make a square hole is faster than using a chisel or other manual methods, and the size of the square hole is more accurate. BulletPoint2 : [SHARP AND EFFICINET]The Square Hole Drill Bit is made of High-Speed Steel.The blade is sharp and wear-resistant, the overall heat treatment (heat treatment), high hardness , long service life, the drill sleeve has a U-shaped design to facilitate the discharge of wood chips and improve the drilling efficiency. BulletPoint3 : [SIZE]Holder diameter: 19mm (circular) ;Drilling core length: 200mm;Slotting flute diameter: 1/2"(12.7mm). BulletPoint4 : [USAGE] This square hole drill bit is suitable for wood, including MDF, MDF, particle board, channel wood, pine wood, basswood, etc. Note: It is not suitable for processing metal, glass, plastic, concrete, gypsum board etc. BulletPoint5 : [INCLUDED ]1x square drill bit. CuttingAngleString : 60.0 degrees ExternallyAssignedProductIdentifier1 : 756557809022 ExternallyAssignedProductIdentifier2 : 0756557809022 FinishType : Diamond ItemName : ATOPLEE Square Hole Drill Bits for Wood,1pc 1/2 Inch HSS Woodworking Square Mortise Drill Bit ItemPackageDimensions_Height : 24 centimeters ItemPackageDimensions_Length : 4.9 centimeters ItemPackageDimensions_Width : 5.9 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : countersink-bits Manufacturer : ATOPLEE Material : High Speed Steel ModelNumber : 5/16 NumberOfFlutes : 2 NumberOfItems : 1 NumberOfPieces : 1 PartNumber : 5/16 ProductDescription : Generally, square hole drills need to be used with square hole drilling machines (square tenoning machines). Using square hole drill bit (installed on a square tenon machine) to make a square hole is faster than using a chisel or other manual methods, and the size of the square hole is more accurate. Note: The size of the clamping drill sleeve of the square tenoning machine needs to be greater than 19mm (3/4 inch) Use note: 1.In normal use, don't try to shape it at one time, but need to press and lift multiple times. This will not only help the drill bit to discharge the sawdust, drill a suitable square hole, but also protect the drill bit. 2.When using continuously for a long time, pay attention to cooling the drill bit. 3.It should be specially pointed out that: We strongly do not recommend using hand drills or ordinary drill stands (non-square tenoning machines) to match this drill bit to make square holes. ProductSiteLaunchDate : 2016-01-13T08:00:00.000Z Size : 1/2 inch SupplierDeclaredDgHzRegulation : not_applicable SurfaceRecommendation : Engineered Wood SurfaceRecommendation1 : Ceramic SurfaceRecommendation2 : Stone SurfaceRecommendation3 : Glass UnitCount : 1 UnspscCode : 27112800