Denny Moorehouse and his partner, Shirley Smith, set up Clogwyn Climbing Gear (Clog) in an old cinema in Deiniolen in North Wales in 1966. Some of their first pieces of equipment were these wiresling nuts. Climbers had been using real nuts, as in nuts and bolts, threaded on a piece of rope to jam into cracks in the rock to make anchors, for a decade or so before Denny started making the massed produced commercial versions around 1967. The very early Clog gear had the word Clog stamped on it without the oval shaped elipse around. See pic 3 opposite. All bar one of the fine set we have here in the collection are the early versions. we’ve cobbled this lot together from various sources to make a set.