window balances

A contractor from princeton nj says:
i need to replace the bottom parts of the window balance

see photos
the coils looks to be ok
need left and right
how do you attach the coils to the clips?????
User submitted image of their window hardware.
Profile picture of Paul
Paul from SWISCO responded:
Hello! Check out our 15-155 pivot shoe. This should be a match for what you have, but you may want to remove yours from the window to confirm. The coil springs are simply screwed on the side of this nylon shoe.
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