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Drill America 3/8 in. 100-Degree High Speed Steel Countersink Bit with 3 Flutes DEWCSK3/8-100 - The Home Depot
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100° Countersink Cutter with #40 (.0980) Pilot, 1/2 Overall Diameter, 3 Flute, High Speed Steel, 1/4-28 Threads - Imperial Fasteners
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Drill America 1 in. 100-Degree High Speed Steel Countersink Bit with 6 Flutes DEWCHAT1-100 - The Home Depot
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100 Degree Countersink Carbide Tipped 1/4 3/8 1/2 5/8 3/4 7/8 1 1-1/4 1-1/2, Three Flute 3585 ID 1898-
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CoreHog C15147 | 0.5000" (1/2) Shank x 1.365" OAL x 100 Included Angle 3 Flute Polycrystalline Diamond Brazed on Solid Carbide Countersink - All Industrial Tool Supply
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HSS Countersink Cutter w/ 3/32" Pilot Hole - 1/2" OD x 100 Degree - Use w/ Replaceable Pilots | Brown Aviation & Aircraft Tools
![1/4" HSS 1-Flute 100 Degree Countersink - USA: Countersink Bits: Amazon.com: Industrial & Scientific 1/4" HSS 1-Flute 100 Degree Countersink - USA: Countersink Bits: Amazon.com: Industrial & Scientific](https://m.media-amazon.com/images/I/31x4QFqj6xL._AC_UF894,1000_QL80_.jpg)
1/4" HSS 1-Flute 100 Degree Countersink - USA: Countersink Bits: Amazon.com: Industrial & Scientific
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Micro 100 QCS-375-100 | 100 Degree Angle x 0.272" LOC x 0.3750" Shank x 2.50" OAL 6 Flute Uncoated Carbide Quick Change Countersink & Chamfer Tool - All Industrial Tool Supply
![KEO 53532 Cobalt Steel Single-End Countersink, Uncoated (Bright) Finish, 100 Degree Point Angle, Round Shank, 5/16" Shank Diameter, 1/2" Body Diameter: Amazon.com: Industrial & Scientific KEO 53532 Cobalt Steel Single-End Countersink, Uncoated (Bright) Finish, 100 Degree Point Angle, Round Shank, 5/16" Shank Diameter, 1/2" Body Diameter: Amazon.com: Industrial & Scientific](https://m.media-amazon.com/images/I/51GGsAq8riL.jpg)
KEO 53532 Cobalt Steel Single-End Countersink, Uncoated (Bright) Finish, 100 Degree Point Angle, Round Shank, 5/16" Shank Diameter, 1/2" Body Diameter: Amazon.com: Industrial & Scientific
![6 Flute Chatterless Countersink - 100 Degree -SOLID CARBIDE - Made in the USA! | Brown Aviation & Aircraft Tools 6 Flute Chatterless Countersink - 100 Degree -SOLID CARBIDE - Made in the USA! | Brown Aviation & Aircraft Tools](https://www.browntool.com/Portals/1/Catalog%20Images/SEV-10-CARB-WS.jpg)