For popular 5-1/2 in and 4 in x 6 in horizontal band saws Hard Back blades permit greater tension, improved blade rigidity and straighter, more accurate cuts Wavy Tooth Style has three teeth with varying sets to the right followed by one straight tooth and three teeth with varying sets to the left Because three teeth share the cutting and the set extends below the gullets, wavy set teeth are less likely to strip than raker set teeth .025 x 1/2 in. wide TPI style: 18 wavy 64-1/2 in. length