From the Manufacturer

Don't let the small size fool you! The NEW INCRA Miter V120 puts high-resolution, repeatable accuracy within the budget of every woodworkers. An incredible 120 angle stops are laser cut into the steel protractor, with a stop available for every whole degree and two special stops at 22.5 Degrees for cutting eight-sided frames and mouldings. All of that precision is built into a sturdy, no-fuss package that's compact enough to fit machines where other miter gauges can be a tight squeeze, such as band saws and disc sanders. All-steel construction makes it an excellent long-term investment, and it's also upgradable as your needs change - the V120 can be equipped at any time with any IncraLOCK miter gauge fence and stop. The steel miter bar is equipped with four patented GlideLOCK adjustment points for a perfect, low-friction fit in a wide variety of machines using a standard miter slot. As with all INCRA crosscutting tools, a removable T-slot retaining clip is included, and the adjusters are accessible from the top for quicker set up than traditional miter bars with side-mounted adjusters.
120 Angle LOCK Indexing Stops
1 Degree Stop Spacing with Special Stops at ±22-1/2 Degrees
Patented GlideLOCK Miter Bar Expansion Disks Provide a Perfect Fit
Removeable Retaining Clip for T-Slot Miter Channels
All Steel Machined and Laser Cut Components