hgudesign 2-Piece Short Shank Drill Bits 28mm with Nitride coating, High Speed Steel HSS 9341 and 1/2 Inch Straight Shank, for Stainless Steel, Alloy, Metal, and Plastic

High Speed Steel cutting tool - 28mm diameter. Ideal for various general applications, offering a blend of durability and hardness for enhanced wear resistance 1/2 Inch Reduced Shank - Broadens the operational range of portable drill chucks. Standard flute and length for fewer adjustments when changing tools - Nitride treatment enhances tool hardness and wear resistance, prolonging sharpness and cutting performance, while also offering corrosion protection. Features designed to keep coolant at the cutting edge Broad Utility - Tailored for boring into materials with low to medium tensile strength, aluminum, iron, copper, and various metals Note: For clean and precise drilling in metals, utilize water for cooling and lubrication. Frequent water application can prolong the drill bit's service life