Roofmaster 12" Carbide Blades give you the most economical cut on the roof deck! 3/16" carbide tip offers a less resistant cut. Roofmaster's high carbon steel blades are laser cut and the 3/16" carbide inserts are induction welded for extra strength and impact resistance. Cutting depth of 2-1/4". Roofmaster offers an exclusive limited warranty on the bonding of our carbide inserts to the steel blade.