Includes: (1) premium 48 inch miter t-track Combo Overview: combines a mini t-track and miter channel track into one solid aluminum dual t-track extrusion Fittings: miter track accepts standard 3/4" X 3/8" Miter gauge bar | t-track possesses specialized T-slot Track mounting for standard 1/4”-20 hex-bolts or DuBois 51055 and 51056, T-Bolts for ¼” T-Track. Please note, will not work with T-Bolts designed for universal t-track. Design: features constructed out of extruded anodized aluminum for optimal performance, durability and t-track efficiency. The straightness tolerance is within 0. 005" In all planes. An extruded line, in the bottom of the track, provides for easy and precise alignment When mounting. Mounting/ versatile/: 7, pre-drilled 3/16” holes, 1-1/2” from each end then 7-1/2” apart, countersunk to fit #8 wood screws, perfect for building customer Router tables, adding miter tracks, or attaching feather boards, stops and cross slide fixtures, Weight: 2.15 pounds, Manufacturer: POWERTEC