Help for Installing Part 10-127

A quick learner from Bradenton Fl 34210 says:
Do you need to drill a hole in the aluminum so the pin could go in through the aluminum? Does the pin go through the aluminum? To be clear does the pin go through the plastic on one side then through the aluminum then through the plastic square on the other side? Thanks for any help you can give me.
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Dave Sr. from SWISCO responded:
The 10-127 shower door guide is designed to be used on a particular shower door that will already have the hole in the bottom door rail. If you don't have the existing hole I would not recommend that you use this guide. You can send us some photos of your shower door along, with the original guide it had, and we can do our best to find a good match.
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