Slow Spiral Downcut router bits are used when the top surface of the material needs to have an excellent finish. the Slow Spiral geometry facilitates excellent finish in hardwoods, solid surface, HDPE, LDPE, HPL and other hard plastics. Downshear router bits are preferred when chip evacuation is not required or downward force is necessary on the work piece. The common applications are sizing, trimming, grooving and pocketing. Increase the number of flutes if fast feedrate is required. Used on 5 axis, point-to-point machines, router tables, handheld routers