uxcell 2pcs 1/2" Reduced Shank Drill Bits 20mm (25/32") Black Oxide M2-6542 High Speed Steel (HSS) Twist Drill Bits for Stainless Steel Cast Iron Metal Plastic Wood

Drill Bit Size: Cutting Diameter: 20mm / 0.79"; Shank Diameter: 1/2"; Cutting Edge Length: 65mm / 2.56"; Overall Length: 160mm / 6.3"; Hardened to: HRC62-65. Black oxide coating increases durability, corrosion resistance and lubricity, and helps to reduce friction and heat.
M2-6542 High Speed Steel: M2-6542 high speed steel (M2 high speed steel with 5% cobalt) provides an excellent combination of hardness, wear resistance, and toughness. Adding cobalt can improve red hardness and heat resistance.
Reduced Shank: Reduced shank drill bit expands the size range capacity of drill chucks. Allows you to efficiently drill larger diameter holes without exceeding the capacity of the chuck. Make sure the drill bit is tightened securely into the chuck.
Wide Applications: Drill clean and accurate holes in stainless steel, cast iron, A3 steel, carbon steel, aluminum, copper, wood and plastic. The sharp cutting edges provide neat and smooth cuts. Large spiral grooves facilitate the export of metal chips, saving time and effort.
Notices: Use a marker or hole punch to mark the exact location, this will help guide your drilling accuracy. Start the drill at a slow speed and gradually increase to the desired drilling speed. Apply steady pressure to the drill. Keep the drill perpendicular to the work surface.

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