Unknow pivot lock shoe

Thanks for posting. If your shoe is exactly 1/2" thick, you may just have an older version of the 15-046, and this would work for you, as this shoe is also 1-1/4" wide and 1/2" thick. Just double-check the thickness to be safe. There are very similar pivot shoes to this one with slightly different thicknesses, such as the 5/8" 15-047 or 9/16" 15-118. Measure as precisely as possible and see what you come up with.