Feature: -Set of 6 countersink drill bits with precision-ground 90-degree tips for drilling into wood, metals, rubber, plastic, and more. -Material of Drill Bit:HSS , classic high speed steel and durability in drilling holes in plastic, aluminum, copper, stainless steel and many other types of sheet metal. -Used in hardness 25 ° below the workpiece, such as carbon steel, sheet iron, insulation board. -3 Flute design: with 3 flutes and staggered cutting teeth, these 90 degree high speed steel deburring tools ensure chip flow smoothly, fast cutting, no chatter, more concentric and easier to use. Specifications: Material: High Speed Steel HSS (4241) Shank type: round Sizes: 6.3 8.3 10.4 12.4 16.5 20.5mm Package Included: 6Pcs Countersink Drill Bit Set.
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