BOARD-PRO Carbide - Fiber Cement Board 12x40 BP-30540. 12 dia. X 40 teeth. 1 arbor, .091 kerf, ATAF grind, 5 hook. Excellent for fast single sheet cutting. BOARD-PRO is the best choice for long lasting performance when cutting fiber-cement board. Fiber-cement board is a very abrasive material that wears down normal carbide very quickly. The Tenryu board-pro incorporates special grade carbide tips for longer life. Each blade features: perfectly-tensioned, hardened-tool steel plates for flat, true run, selected quality carbide grade, extra long blade life, economically priced and produces less dust than traditional blades.
Tenryu puts a great deal of care in manufacturing their saw blades to ensure every blade is of the highest quality. See our article on making Tenryu Saw blades.