About this item 5-1/2" 40Teeth Crosscut Blade: 5-1/2" / 140mm / 20mm arbor, 5/8"(16mm) & 1/2"(12.7mm) Reduction Ring, Body Thickness: 1.0mm, Kerf: 1/16" (1.6mm), MAX RPM: 10,000 (Rotations Per Minute) 5-1/2" 24Teeth Rip Blade: 5-1/2" / 140mm / 20mm arbor, 5/8"(16mm) & 1/2"(12.7mm) Reduction Ring, Body Thickness: 1.0mm, Kerf: 1/16"(1.6mm), MAX RPM: 10,000 (Rotations Per Minute) Made with construction tungsten carbide and alloy steel, provide maximum wear and heat resistance for longer life. Laser Cut Lines and Wind Holes: Stabilizer Vents trap noise and vibration for maximum stability, keeping the blade cool for straight, accurate cuts 40x ATB TCT Teeth designed to make clean, finished cuts rip / across the grain of all wood types, 1/16" kerf cuts through material more efficiently than full kerf, and it uses less power to do so. 24x ATB TCT Teeth are optimized to cut through wood with, or along the grain. Typically used for initial cuts, they clear long fibers of wood where there is less resistance than when cutting across the grain. Easy to fit, sharp and quick to use, cuts well, cleanly and accurately, smooth cut surface, dustless when cutting, healthy for operater and less pollution The cut made is fine and smooth, and the processing efficiency is high and reliable.