Yea, I have a Aqua Performance retractable step on my boat. My swim steps are stainless frames with plastic slats.
I mounted it to the slats and then thus bolted the slats to the stainless frame with stainless carriage bolts .
The slats themselves are probably just over a 1/2 inch thick.
I love the step, board the boat and not worry about the step hanging down or coming loose
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