Review on Enhance Your Cutting Performance with Lenox Tools 2995858CG Master Grit Carbide by Brian Rogel

This diamond coated hole saw is the only one you can use to drill holes in hardboard or Du Roque, like 25 holes in a newly installed soffit floor. We used a Hardee board and started with a regular round vent hole saw. We just made one hole with a regular bi-metal hole saw and the teeth were gone. Diamond completed 25 holes with no problems. still like new. Wow!