Specification Brand : Bosch Accessories BulletPoint1 : 5 tungsten carbide drill bits BulletPoint2 : Diameters 4/5/6/7/8 mm BulletPoint3 : Plastic display box BulletPoint4 : 2607019445 BulletPoint5 : [INCLUDED ] 3pcs 5/16 3/8 1/2 Inch square drill bit. Color : Blue CustomerPackageType : Standard Packaging CuttingAngleString : 135 degrees ExternallyAssignedProductIdentifier1 : 3165140415637 ExternallyAssignedProductIdentifier2 : 03165140415637 ExternallyAssignedProductIdentifier3 : 3165140067065 ExternallyAssignedProductIdentifier4 : 03165140067065 FinishType : Tungsten Carbide GpsrSafetyAttestation : 1 Hazmat : No ItemName : Bosch 5 pcs. Concrete Drill Bit Set (for Concrete, Ø 4-8 mm, Accessory Drill Driver) ItemPackageDimensions_Height : 1.2 centimeters ItemPackageDimensions_Length : 15.6 centimeters ItemPackageDimensions_Width : 5.6 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : wood-drill-bit-sets Manufacturer : Bosch Material : Carbide ModelNumber : 2607019445 NumberOfFlutes : 2 NumberOfItems : 1 NumberOfPieces : 1 PackageLevel : unit PartNumber : 2607019445 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. Material: HSS Size: inch Type D(Hole diameter) D1(Handle diameter) D2(Clamping diameter) B(Grooving depth) L(Total length) 5/16 5/16 approx 1/4 3/4 approx 2 approx 8-1/2 3/8 3/8 approx 5/16 3/4 approx 2 approx 8-9/16 1/2 1/2 approx 3/8 3/4 approx 2-3/4 approx 8-1/4 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 : 2012-08-07T22:16:04.407Z Size : Ø 4.00 mm StreetDate : 2008-11-13T00:00:01Z Style : 5 pcs. SupplierDeclaredDgHzRegulation : not_applicable SurfaceRecommendation : Plastic UnitCount : 5 UnspscCode : 27111700