DT12840. Carbide Tipped Ditec 12 Inch Dia x 84T H-ATB, 0 Deg, 1 Inch Bore. Designed specifically for the Holz-Her® 220mm panel saws. Resistance to abrasion is the single most important characteristic of the tungsten carbide used for saw teeth. DITEC™ saw blades feature carbide tips with greater hardness, with no loss of toughness, than any previous formulation. Using this carbide, Amana Tool® has produced a line of laser cut saw blades that last 2 to 3 times longer than standard carbide formulations.