Newbie question regarding miter tracks, miter bars, t-tracks, etc

Newbie question regarding miter tracks, miter bars, t-tracks, etc miter slot bar Accommodates Variations in Miter Slots Specs: Mounts to a 516 * 58” Miter Slot, or a 12-19mm T-Track 2 – 58″ Small Miter Bars; 2 miter slot track 100mm Aluminum Alloy T-Slot Slider Bar Miter Track Jig T Screw Fixture Slot T-Slot Sliding Bar with M6 M8 Holes for Table Saw Router Table Woodworking Tool (

miter slot track The perfect 90° cut starts with the miter bar There was a time when the machining of the miter gauge slot in a table saw was held to strict tolerance The

miter slot bar Incra Miter Slider combines the stability and strength of anodized aluminum with a bar width adjustment mechanism for a perfect fit in your miter slot, The JSS ships with a miter gauge that's got a piece of top hat aluminum extrusion that perfectly fits the miter slot Ideally I'd like to