Power Tool Series for Miter Or Slide Miter Saws PT-21660-1. 8-1/2" Dia., 60 Teeth, 5/8" Arbor, ATAF Grind, .079" Kerf, 5 Degree Rake. A super performer on 8-1/2" miter saws. Tenryus power tool series saw blades feature fully hardened, expertly tensioned tool steel bodies that absorb impact, resist excess heat build-up, and stay flat. They are tipped with a high-grade, C-3, fine-grain tungsten carbide tip that resists erosion for extended blade life. Tenryu Power Tool Series blades have an aggressive Degree Rake angle for maximum cutting speed and efficiency. Each tip is precision honed on all four exposed surfaces to minimize micro-chipping along the cutting edge, resulting in a sharper, longer lasting edge. 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.