Improvements to router apparatus

A router power tool including a housing mounted to be moveable with respect to and spaced from a base， said housing including a motor to rotate a shaft which includes， at its free end， a tool holder for a cutting tool， said shaft extending from the housing such that the tool holder is located at or adjacent to the base and said housing is connected to the base by at least one extendable assembly. The power tool is selectively locatable with a guide plate via retaining means. The guide plate includes apertures for the receipt of retaining means to allow the power tool to be engaged therewith and datum tabs to contact with the power tool to ensure the accurate location of the power tool with the guide plate when held in position by the retaining means.