Oval screw links are similar to carabiners and can be used in areas where connections are not removed frequently and are more permanent. They are available in sizes from 3 mm all the way up to 160 mm and are manufactured from galvanized steel. Several models are rated as PPE (Personal Protection Equipment) and are CE rated as such. The PPE models work great in ascending systems as the oval shape greatly reduces the risk of gate loading during an ascent. Made in France.