Milescraft CircleGuideKit Peat Moss This piece is not just This piece is not just a functional addition but a statement of luxurious living Tool free door install with ratcheting hinge latch design that easily accommodates different drywall depths with an easy readout window for setting the diameter of both your inside and outside circle cuts Large circle jig for cutting circles from 12 1 2 In to 52 In and has built in imperial and metric scales with an easy readout window for setting the diameter of both your inside and outside circle cuts Bonus offset base 12 In offset base provides added stability when finishing the edges on your work piece using your router Equipped with patented turn lock technology allows for fast tool free guide bushing and router attachment exchanges