4 Flute
4 flute countersink, made of high speed steel.
4 flute design for "chatterless" cutting. Generally used on harder materials.
Standard included angles available: 60°, 82° (standard for imperial, or "inch"-sized flat-head screws), 90° (standard for metric flat-head screws), 100°
 Countersinks, 4 Flute, 60 Degree
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Countersinks, 4 Flute, 82 Degree
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