Extension Cord Spool Clip

I've been using some of my empty Bambu Lab spools to store extension cords and wanted a way to hold the plugs in place. so I designed a spool clip for them. There are three different sizes with slightly different cord diameters. The are designed to be a firm grip on the cord and should remain on the cord when using it. I am using them with a variety of 16/2 and 16/3 gauge exterior cords with good results.