Keo® 917-000-827 Is A 90° 5-Piece Countersink Set With 3-Flute Geometry In Carbide And A Altin Coated Finish Containing Body Diameters 1/4",3/8",1/2",3/4",1". Made In The Usa By Keo®, This Set Is Designed For General Purpose Chamfering And Deburring And Delivers Smooth Cutting Action, Accurate Results, And Consistent Performance In Cnc Machining, Drill Press Work, And General Metalworking. The Carbide Construction Maximum Rigidity And Wear Resistance, While The Altin Coated Surface Adds High Heat Resistance For Higher Speed Machining And Tougher Materials. 90° Tools Are Also Ideal For Countersinking Metric Standard Flat Head Screws, Which Have A 90° Angle Under The Head, Helping Ensure Proper Fastener Seating And Clean Finishes.

• 5 Piece Set
• Includes Body Diameters 1/4",3/8",1/2",3/4",1"
• 3 Flute Design Made From Carbide with an AlTiN Coated Finish
• 90° Included Angle
• Optimized for general purpose chamfering, deburring, and metric flat head screw countersinking (90°)
• Precision Ground Cutting Edges
• Adds high heat resistance for higher speed machining and tougher materials
• Ideal for CNC and Production Machining.
• Made in USA

This item is part of our complete offering of ARCH Cutting Tools, trusted for high-performance CNC machining across drilling, milling, holemaking, and indexable applications. Explore Patriot HP Cutting Tools for advanced solid carbide and high-performance machining solutions, KEO Cutting Tools for precision countersinks, center drills, and holemaking tools, Ultra-Dex Cutting Tools for productive indexable milling, drilling, and insert-based machining, and Revere Cutting Tools for high-performance carbide end mills and milling solutions. Visit our main ARCH Cutting Tools page to compare tool styles, coatings, geometries, and performance options to find the right solution for your application.