Product Description Premium 12″ DIAMONDSAW BLADE PREMIUMdiamond saw blades aredesigned for use on demolition saws, quick cut saws and brick saws, these blades feature a hardened body and laser welded diamond tipped teeth for long life. These blades are designed for cuttingconcrete, reinforced concrete, blocks, bricks. These are a professional series blade that provides long blade life and fast cutting speeds the blades feature a full size diamond segment. Segments are laser welded for extra strength and durability. size: 300 (12″) Arbor: 30mm + 19.7mm bush Product features: Laser weldeddiamond teeth hardened and tempered body expansion gullets to eliminate warping, reduce heat buildup and remove debri corrosion resistant coating protects blades from rusting