Specification Brand : KEWAYO BulletPoint1 : Material: Made of high speed steel, titanium coated. BulletPoint2 : Use: 90¡ã angle on the point for sharp and precise countersinking, used for workpiece circular aperture chamfering or cone hole. BulletPoint3 : Chamfer range: 2-5mm, 5-10mm, 10-15mm, 15-20mm; Shank diameter: 6mm, 8mm, 10mm, 12mm; Head diameter: 10mm, 14mm, 21mm, 28mm BulletPoint4 : Application: Suitable for cutting thin metal, wood,plastic and thin iron plate (hardness <25 degrees) BulletPoint5 : This bits should use the bench drill , it is easy to shake and it will affect the chamfering effect if you use the hand drill Color : Black-50mm & Adapter CuttingAngleString : 90 degrees FinishType : Titanium,Titanium Coated IncludedComponents : WU ItemName : KEWAYO 4pcs Titanium Coated Countersink Chamfer Tool Deburring Tool Set Metal Wood Drill Bits Zhongbo Business ItemPackageDimensions_Height : 1.26 inches ItemPackageDimensions_Length : 3.82 inches ItemPackageDimensions_Width : 2.87 inches ItemTypeKeyword : countersink-bits Manufacturer : KEWAYO Material : High Speed Steel ModelNumber : KUDJ7245SDIVJ872AAA3301 NumberOfItems : 4 PartNumber : KUDJ7245SDIVJ872AAA3301 ProductDescription : This 4 pieces Countersink and Deburring Tool Set is ideal for cutting through metal, wood and plastic quickly and easily.