Routers can be divided into two categories: fixed base and plunge base. On a fixed base router, once the bit is in and the base is locked, the bit is in a ‘fixed’ position, meaning its depth is set and will stay set (Photo 1).

Routers can be divided into two categories: fixed base and plunge base. On a fixed base router, once the bit is in and the base is locked, the bit is in a ‘fixed’ position, meaning its depth is set and will stay set (Photo 1).

Original article and pictures take https://wwgoa.com site