Steel strip is useful for toughening runners against abrasion from transitional surfaces like decking, grass or even concrete.
There's a wide range of adhesive steel tapes available from the likes of 3M, tho' here I've secured either end with a rivet.
Though previously I used a washer for reinforcement, I found today that the uPVC will support a 4 x 10mm pop-rivet without it pulling through.
Learning by building!