FOR SALE IS A NEW ( OLD STOCK ) OEM VELUX SKYLIGHT SNAP-IN HEX NUT ADAPTER.    THIS IS AN ACTUAL VELUX PART   # 017690.  MADE FOR VELUX SKYLIGHTS.   THE HOOK THAT IS SEEN IN THE LAST PICTURE IS SOLD SEPARATLY ( ZOZ-031 - EBAY # 224505814367 )