This is a 25mm pitch pegboard soldering alloy spool holder. Two spools with max outer diameter 55mm may be placed on one holder.
To simplify printing I designed it with a round inserts with knobs of inner spool diameter 27mm for my spools. If you have other inner size than just draw your own. Or ask me to do it :)
It has mount hooks so it may be easily replaced all over pegboard. The holder is designed for 5mm pegboard holes.