Because they cut better that way. The tooth count on all Evolution blades is optimised for the rotation speed of the saw the blade is designed for. Our saws are equipped with higher-torque, reduced RPM motors that give you a better cut when used with our blades. It is the combination of blade design, TCT technology and higher-torque motors that enables Evolution multi-material saws and blades to cut new and reclaimed wood, mild steel, non-ferrous metals as well as plastics and composites with just one blade.