Roofmaster 12" Carbide Blades give you the most economical cut - on the roof deck! 1/4" carbide tip offers a quality cut. Roofmaster's high carbon steel blades are laser cut and the 1/4" 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.