In this video Master Wholesale President Blake Adsero tests four Diamond Glass Cutting Blades to see which one comes out on top on multiple glass surfaces. We test the MK Diamond MK 315GL Glass Cutting Blade, The Pearl P5 Resin Bond Diamond Glass Cutting Blade, the Montolit Premium Diamond Glass Cutting Blade, and the Alpha Vetro Premium Glass Blade. These blades are tested on mosaic glass sheets, a plate glass shelving piece, and a piece of glass with a painted or coated back.