Cut circles from 10" to 52" in diameter Tough, long-lasting phenolic core Includes mounting hardware to fit a variety of routers Includes Two Center Pivot Pins, T-bolt with 4-star tightening knob Mounts quickly to many popular routers made by Porter Cable, Makita, Hitachi, DeWalt, and Bosch Rockler Woodworking Circle Cutter Tool: This circle wood cutter works great for cutting perfect circles from 10'' to 52'' in diameter --- Easy Assemble Circles Cutter: Place your circle cutting jig on a flat surface with the countersink holes facing down. - With your router unplugged, remove the base plate. - Mount your router tool to the circle cutting jig using your existing screws or the ones provided. See router jigs mounting hole key. - Assemble pivot point and knob. Use pin A when cutting from the bottom surface or a predrilled 1/8" hole and Pin B when cutting from the top surface. - The radius of your circle is the distance from the inside edge of the router bit to the center of the pin. Set router to a depth of cut and rout in a counterclockwise direction. --- Router Jig For Cutting Circles Fits the following Routers: Porter Cable 100, 690, 890, 7529, 8529 - Makita 1100 Series - Hitachi M12VC - Dewalt DW616, DW618, DW625 - Bosch 1617 Series, 1618 Series, 1619 and 1619 EVS. --- Circle Cutter Router Jig Specifications: Weight: 2.550000 – Type: Circle Cutting --- About Us: The history of Rockler Woodworking and Hardware goes back to 1954, when Norton Rockler started the Minnesota Woodworkers Supply Company in north Minneapolis. It was a small mail-order business with a big aspiration – to become woodworkers' go-to resource for everything they need to complete their projects.