5Pcs 1/4" Shank HSS Countersink Drill Bit 82?? 5-Flute Cobalt M35 Chamfer Cutter

HSS Countersink Drill Bit Set

This 5-piece 1/4-inch hex shank countersink drill bit set uses M35 cobalt high-speed steel to cut smooth 82-degree chamfers in metal and wood.

Overview

This cobalt chamfer cutter set delivers chatter-free performance when beveling holes for flush-mounted screws. Each countersink drill bit features an 82-degree tip angle and 5-flute design to optimize chip clearance and prevent binding. Metalworkers and carpenters rely on this countersink drill bit set to deburr and chamfer holes in alloy steel, wood, and plastics.

Built For Performance

• Constructed from premium M35 cobalt high-speed steel for superior heat resistance.
• Features a universal 1/4-inch hex shank for rapid changes in impact drivers and drills.
• Five-flute geometry reduces vibration and ensures a smooth, clean cut.
• Standard 82-degree tip angle aligns with common flathead countersunk fasteners.
• Includes five distinct cutter sizes to handle various hole diameters.

On-The-Job Use

• Deburring drilled holes in stainless steel and alloy sheet metals.
• Creating countersunk recesses for flush wood screw installations in cabinetry.
• Chamfering plastic and acrylic sheets to prevent stress cracking.

Specs At A Glance

Good To Know

Q: Can these cobalt bits drill through stainless steel? A: Yes, the M35 cobalt steel composition provides the necessary hardness and heat resistance for stainless steel applications.

Q: What is the purpose of the 5-flute design? A: The five flutes distribute the cutting load evenly, significantly reducing chatter and leaving a much smoother finish.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.