I have a dogo argentino 60Kg. for forest walks we love having this type of leaves but last cracked (cétait yet scheduled its weight and purchased at pet stores). I am surprised by the price but also the strength! the leash is not a simple wire but a loin flat and wide 1.5cm or 1 and this on 5 meters. it unfolds and wraps great. There is a "permanent" or "one-off" brake. Only small downside is a little heavy but for the price and quality it is a detail!