My pegboard is secured with thumb bolts set in brass threaded inserts. To keep my snake from getting behind it, I use rubber window insulation strip. My snake got behind it anyway (see my post). It wasn't the insulation that failed. By trying to get a really tight fit, I, inadvertently, bowed the pegboard giving him a gap that he was able to exploit. Since I fixed that, I haven't had any trouble. Though, I reinforced the window insulation by laying some dowel rods on top of the bolts anyway.
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