4PCS Cobalt Single-End Countersink Chamfer Tool Set - Heavy-Duty M35 90-Degree Countersink Bits for Metal, Stainless Steel, Copper, Wood, Fiberboard,SAE 1/4"-3/4", 2-5, 5-10, 10-15, 15-20MM

【Premium Quality】Crafted from M35 Cobalt High Speed Steel with cobalt coating, our countersink drill bits boast unparalleled toughness, high temperature threshold and long-term durability, delivering consistently exceptional results.
【Impressive Performance】Used after pre-drilling for screws, they cut cleanly and are chatter-free. The cone tip assures accurate centering, also the enlarged spiral flute prevents chips from clogging and ejects chips rapidly. Designed to handle tough materials like stainless steel and other high-performance alloys.
【Versatile Application】Our drill bits are compatible for use with a range of drilling machines, table drills, milling machines, cordless drills and impact drivers. Perfect for machinists, DIY enthusiasts and homeowners.
【Portable & Convenient】Our countersink chamfer tools come with individual storage cases for easy portability. Say goodbye to lost bits and restless searches for the right tool.
【Comprehensive Set】This set includes 4 drill bits in varying sizes, with each of the 2-5MM, 5-10MM, 10-15MM and 15-20MM countersink chamfer tools included, providing you with a complete package for all your drilling needs.

M35 Cobalt High Speed Steel Used after pre-drilling for screws, they cut cleanly and are chatter-free.

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