Specification Brand : GUDINGHENG BulletPoint1 : 1. The small-shank twist drill bit is made of high-quality high-speed steel, featuring good wear resistance, high cutting edge strength, and fast cutting speed. BulletPoint2 : 2. With numerically controlled precision grinding of the double relief angle, it cuts more sharply and drills holes more quickly. BulletPoint3 : 3. The widened chip removal groove enables rapid and efficient chip removal, effectively preventing the drill bit from burning due to accumulated heat. BulletPoint4 : 4. The universal shank is compatible with more devices and can be clamped more firmly. BulletPoint5 : 5. There are various models ranging from 12-10mm to 35-12.7mm for you to choose from, meeting your different needs. BulletPoint6 : 6. It is suitable for a variety of different devices. For the electric hand drill: within Φ16mm (it cannot be used when the thickness of the steel plate is greater than 5mm and the hole diameter is greater than 16mm). For the bench drill: within Φ20mm (it cannot be used when the thickness of the steel plate is greater than 20mm and the hole diameter is greater than 20mm). For the magnetic drill: within Φ30mm (it cannot be used when the thickness of the steel plate is greater than 30mm and the hole diameter is greater than 30mm). BulletPoint7 : 7. When drilling stainless steel, it is essential to inject water. CuttingAngleString : 3 degrees ExternallyAssignedProductIdentifier1 : 0753839931792 ExternallyAssignedProductIdentifier2 : 753839931792 FinishType : Chrome GpsrSafetyAttestation : 1 IncludedComponents : Reamer Bit ItemName : GUDINGHENG 4341 High Speed Steel Black - Gold Small Shank Drills: Multiple Models, 12-10mm to 35-12.7mm, for Stainless Steel, Copper, Plastic, Wood & More ItemPackageDimensions_Height : 2.75 inches ItemPackageDimensions_Length : 0.4 inches ItemPackageDimensions_Width : 0.4 inches ItemPackageQuantity : 1 ItemTypeKeyword : ship-auger-bits Manufacturer : GUDINGHENG Material : Tungsten Steel ModelNumber : GDH015 NumberOfFlutes : 2 NumberOfItems : 1 NumberOfPieces : 12 PartNumber : GDH015 ProductDescription : 1. The shank of the equal-shank drill has a fixed size. Its bearing capacity increases with the increase of the drill bit diameter. Meanwhile, the risks of the shank breaking and failing to be clamped firmly will also increase accordingly. Please choose it carefully. 2. When using an equal-shank drill bit to drill holes, water or coolant should be added for cooling to prevent the drill bit from being burned out. 3. The equal-shank drill is not suitable for drilling concrete and brick walls. 4. When operating with an electric hand drill, be sure to adjust the rotation speed. If the rotation speed is too fast, the drill bit is likely to be damaged. 5. For metals with high hardness and a large amount of impurities, the drilling rotation speed should be slower than the normal speed. At the same time, the effect is better when used with cooling. When processing products with a large thickness, if there is an abnormal chip removal situation, please remove the chips in a timely manner.