Micro Jig Inc.’s ZeroPlay® Guide Bar is glass-reinforced polymer designed to fit or replace wood runners on shop-made jigs as a one-touch calibration miter bar. It’s adjustable to fit standard miter slots in most table saws and router table extrusions. The “zero play” extends its entire nine inches for one-touch calibration, A single bar package sells for $11.99; two bars and two ZeroPlay Stops for $26.99; and individual stops for $4.99.