These parts came in a box of oak park router stuff I picked up at a garage sale. It was similarly packaged, but the folks at oak park say it isn't anything of theirs. The label does suggest this is saw-related.
An accompanying label says the following:
1. Choose the pair of metal clamps that best fit your saw's soleplate
2. Extra plastic sacers are provided to allow increased cutting depth if your saw is capable of it. Do not remove the bolts from the guardbards during the installation of these spacers.
Here's a picture:
Thank you in advance