INCRA Miter Slider SE 18 in. features all-steel bars that superior rigidity d to wooden or plastic runners, ensuring consistent performance unaffected by changes in humidity or temperature. Designed with two separate bolt patterns, the bars include four 0-24 holes for seamless compatibility with INCRA Build-It Panels and three 1/4-20 holes evenly spaced for attaching knobs and other fasteners commonly used in jig and fixture construction. The long-lasting Nylon GlideLOCK adjusting discs provide a precise fit in the miter slots of most table saws, router tables, and band saws, delivering smooth, low-friction movement. This 18-inch bar includes two pairs of adjustment points and comes with removable T-slot retaining clips on both ends to enhance stability for larger jigs. It fits square-sided miter slots approximately 3/4" wide by 3/8" deep, with or without a 15/16" wide T-slot at the bottom, and accommodates slot widths from 0.740" to 0.765" thanks to the GlideLOCK adjustment. Please note, Miter Slider SE bars are not for stationary jigs that require locking into position; for those applications, the standard aluminum Miter Slider is preferable. Proudly made in the USA.