Guides for ring saws and ring saws incorporating them and template systems are provided. The guides can be circular, square, rectangular or portions thereof. The system can comprise a guide and a template. The template can be configured to be placed onto a workpiece in a fixed relation relative to the workpiece. The template has an edge along which a side edge of the guide can travel. The guide is attachable to a platen of the ring saw and can include an insertion channel and a blade aperture for allowing passage of a blade of the ring saw during attachment of the guide to the platen. The guide and the template can be sized and configured such that the side surface of the guide can contact the edge of the template for allowing the guide to be moved along a desired cut path to quickly and easily create a precise cut.