These heavy duty durable commercial grade band saw blades are for industrial woodworking DIY and professional craftsmen. They are the premium band for woodworking. Tooth hardness 62-63rc back hardness 28-32rc regular skip and hook shape teeth raker set left right straight (raker) pattern cuts hard/soft wood plastic mild steel and non-ferrous metal (for machines with speed reduction). For all vertical/ stationary 2-wheel band saws.