34-925 Auto-Set Miter Gage
This will fit a Delta Rockwell 12" Tilting Arbor Saw
The Miter Gage has a 91½ inch face and 14 x 7/16 inch bar which fits the T-slots of the saw table.
It can be set at any angle up to 60 degrees right or left, and has adjustable stops for instantaneous settings at zero and 45 degrees right or left.