Rope tensioner

We need such rope tensioners for a cucumber tent. They have 5mm holes. Therefore we would recommend a rope up to 4mm. We haven't installed them directly yet, so unfortunately there are no real-life pictures yet (if we don't forget, the pictures will come soon). The rope is fastened with a knot in the upper hole and then guided through the middle and lower hole in a curve. To tighten the eyelet simply pull on the tensioner.