Specification AgeRangeDescription : adult Brand : SALI BulletPoint1 : Size and material:Each metal drill bit has a diameter of 5/16 inch and is made of cobalt M35 high-speed steel (hss), which has superior toughness and durability BulletPoint2 : Durability and applicable scenarios:High speed steel improves the surface hardness and wear resistance of drill bits, allowing them to easily penetrate sturdy materials and have a longer service life. Suitable for various scenarios such as metal, wood, plastic, aluminum alloy, etc BulletPoint3 : Withstand heavy blows and quick replacements:The 1/4 inch hexagonal shank design allows the drill bit to withstand high torque transmission and heavy pressure. In addition, the drill bit is equipped with a quick replacement design, which facilitates the quick replacement of cutting tools BulletPoint4 : Quick drilling:The specially designed 135 degree segmentation point prevents the drill bit from moving during contact, making it easy to start drilling. The precise parabolic groove shape helps with rapid chip removal, reducing friction and heat accumulation. Its sharp cutting edges make it easy to cut on wood and metal BulletPoint5 : Work efficiency:Combining high speed and durability, it is favored by electricians, plumbing workers, professionals. Suitable for soft metals such as metal, wood, thin wooden boards, aluminum, copper, etc., as well as for home diy, general construction, and home engineering projects Color : 10pcs ExteriorFinish : Stainless Steel ExternallyAssignedProductIdentifier : 8095458379206 ExternallyAssignedProductIdentifier1 : 0844699043524 ExternallyAssignedProductIdentifier2 : 844699043524 GradeRating : 304 ItemName : SALI Cobalt Drill Bit Set,5 Pack 5/16 Inch High Speed Steel Hex Shank Jobber Drill Bits, for Hardwood, Aluminum,Metal,Copper,Alloyed Steel ItemPackageDimensions_Height : 0.2 centimeters ItemPackageDimensions_Length : 0.2 centimeters ItemPackageDimensions_Width : 0.2 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : jobber-drill-bits Manufacturer : SALITools ManufacturerGrade : Grade 304 Material : Metal MeasurementSystem : Imperial ModelName : LPXDS ModelNumber : LPXDS NumberOfBoxes : 1 NumberOfItems : 5 PartNumber : CAO06MHZ004 ProductDescription : 1. Cemented carbide multi-layer coating, long service life, fast cutting speed, low friction coefficient, good wear resistance; 2. Turning blade, stainless steel and steel design, sharp and wear-resistant, smooth chip removal; 3. Used for turning and finishing of various materials;