a cutting guide for a saw , the guide comprising : a guide including a follower path , the guide including a plurality of indicia each representative of a plurality of different substrates ; a follower repositionable with respect to the guide along the follower path and into alignment with at least one of the plurality of indicia ; and , a lock operatively coupled to the follower , the lock being repositionable between a locked position and an unlocked position , the locked position operative to retain the guide in a fixed position with respect to the follower , and the unlocked position operative to allow a relative position of the guide with respect to the follower to be changed .