Specification Brand : Jerax tools BulletPoint1 : [M2 HSS]: Cuts A LOT MORE CLEAN holes and much EASIER than average step bits. In general, M2 has 50% more Tungsten and 150% more Molybdenum, both of which are key elements in improving durability. Our additional Vacuum heat treatment and Nitride surface hardening treatment make the performance even better. BulletPoint2 : [Non-stop]: Our Polished Steps and Size Highlights let you able to see target hole size during drilling. No need to stop in the middle of the drilling and check. Save you time and hassle. BulletPoint3 : [Easier | Faster | Cleaner]: With our high-accuracy CNC processing and several optimized design details over the years, our design cuts EASY, FAST and CLEAN, outperforming the average ones on the market. BulletPoint4 : [Heavy duty]: Cuts holes on Stainless steel (need appropriate pressure), Hardened Metal, Mild steel, Galvanized steel, Aluminum, Copper, Plastic, Wood, or anything that has similar or lower hardness as these materials. Up to 12ga /2.7mm thickness for Stainless steel. BulletPoint5 : [Multi Hole Sizes]: No need to buy a kit. This one step bit comes with 5 marked sizes so you can drill 5 different hole sizes, saving you time and efforts to change bits. Marked sizes including: 7/8", 1-1/8", 1-7/32", 1-1/4", 1-3/8". BulletPoint6 : 【TiAlN】:TiAlN coating is a new coating material in recent two years.ndustrial-grade construction ensures durability and longevity It has high hardness, high oxidation temperature, good thermal hardness, strong adhesion, low friction coefficient and low thermal conductivity coefficient. Color : Black CuttingAngleString : 118 degrees FinishType : Nitridation GpsrSafetyAttestation : 1 IncludedComponents : 3 ItemName : Jerax tools 1/4 to 1-3/8 Inch Step Drill Bit Straight Grooved Double Fluted, M2 High Speed Steel Drill bits for Hole Drilling in Stainless Steel, Copper, Aluminum, Wood, Plastic ItemPackageDimensions_Height : 10.5918 centimeters ItemPackageDimensions_Length : 3.9116 centimeters ItemPackageDimensions_Width : 3.9878 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : step-drill-bits Manufacturer : Jerax tools Material : High Speed Steel (HSS) ModelNumber : STG1-3/8 NumberOfFlutes : 2 NumberOfItems : 3 NumberOfPieces : 3 PackageLevel : unit PartNumber : STG1-3/8 ProductDescription : 1/4 to 1-3/8 Inch Step Drill Bit Straight Grooved Double Fluted, M2 High Speed Steel Drill bits for Hole Drilling in Stainless Steel, Copper, Aluminum, Wood, Plastic ProductSiteLaunchDate : 2021-05-13T15:51:23.500Z Size : 1-3/8" Style : Straight- 3 PC Set SupplierDeclaredDgHzRegulation : unknown SupplierDeclaredHasProductIdentifierExemption : 1 SurfaceRecommendation : Stainless,Wood,Aluminum,Copper,Plastic,Steel SurfaceRecommendation1 : Aluminum SurfaceRecommendation2 : Metal SurfaceRecommendation3 : Plastic SurfaceRecommendation4 : Stainless Steel SurfaceRecommendation5 : Wood SurfaceRecommendation6 : Copper UnitCount : 1 UnspscCode : 27111700