A circle compass is provided. The circle compass includes a main body attachable to a router and an adjustable arm. The main body includes a central receiving aperture configured to receive a router bit or shaft therethrough. The adjustable arm is slidably attached to the main body and has a centering pin. The centering pin extends axially outward beyond a bottom side of the main body. The adjustable arm is slidable along an adjustment axis between a retracted position being associated with a smallest hole that can be formed and an extended position being associated with the largest hole that can be formed. The adjustable arm includes a clearance slot that at least partially aligns with the central receiving aperture of the main body through which the rotating portion of the router must extend to form a cut in the work piece.

The present disclosure provides a sliding adjustable compass having a support for holding a variety of marking and cutting implements which can be easily replaced when they are used up. The construction of the compass is such that large diameter circles can be marked or cut precisely with the help of a viewing lens, whilst maintaining portability by a modular design.

The present disclosure provides a sliding adjustable compass having a support for holding a variety of marking and cutting implements which can be easily replaced when they are used up. The construction of the compass is such that large diameter circles can be marked or cut precisely with the help of a viewing lens, whilst maintaining portability by a modular design.