Rashi on Exodus 27:19/רש"י על שמות כ״ז:י״ט

1לכל כלי המשכן ALL THE VESSELS OF THE TABERNACLE that were necessary for erecting it and for taking it down as, for instance, hammers to drive in the pegs and the columns.

2יתדת PEGS — a kind of copper nail made for the curtains of the אהל (the second layer of curtain over the top) and for the hangings of the enclosure, fastened to these by cords all the way round them on their lower edge in order that the wind should not lift them up. I do not know for certain whether they were stuck in the ground or whether they were merely tied to the edges and hung down, their weight loading the edges of the curtains that they should not move about in the wind. But I would say that their name (i. e. the name given here to these pieces of metal) shows that they were stuck in the ground, and for that reason they are here called יתדת. The following verse supports me in my opinion: (Isaiah 33:20) “A tent that shall not be taken down; its stakes (יתדותיו) shall never be plucked up.”.