Guhring - Series 4115, 21mm Diam Grade K/P 140° Replaceable Drill Tip - Carbide, nano-A Finish, 210 Seat Size

Solid carbide is extremely heat resistant and used for high speed applications. It is commonly used on cast iron, nonferrous materials, plastics and other tough-to-machine materials.

Nano-A combines TiAlN and AlTiN coatings in a micro-layer structure that is harder and more wear resistant. It is used at high speeds on alloy steels, stainless steels and aerospace materials. Nano-A is a proprietary coating exclusive to Guhring, Inc.