Pivot Lock Shoe
A quick learner from Harrisburg, NC says:
June 5, 2016
My Pivot Lock shoe has the exact same dimensions as your 15-188 with Blue Shoe. Will the blue shoe work as a replacement for mine. Mine has a White Shoe.
Paul from SWISCO responded:
June 7, 2016
I agree, the 15-188 looks like a good match. Assuming the dimensions are the same I think this will work.