Abstract: A metal clip is formed with an arcuate front base portion having a pair of generally C-shaped flange side anchor portions projecting from folded back edges of the clip. Fencing materials such as wire or rails are attached to a flange projecting from the bottom edge of the clip. When the clip is inserted into a channel with inwardly turned edges the C-shaped flanges clip onto the edges. When the arcuate front base portion of the clip is flattened by striking with a hammer, the C-shaped flanges rotate into locking engagement with the inwardly rolled edges of the channel.