EZSMART Super Smart Routing Kit Turn your router into a precision tool using the SSRK to control movement in the x, y and z axis Glides smoothly along any EZSmart Guide Rail or track system, also compatible with Makita Make straight, uniform fluted columns, repeatable mortise and tenon joinery, precise dovetails Create long, clean dado cuts, duplicate odd shapes or create sweeping arcs Extends 11 inches perpendicular to the Guide Rail.