This is a Simpson Strong-Tie PGT2E-R50 Pipe Grip Tie 50/Pack. Pipe Grip Ties attach wood fence rails to metal fence posts, eliminating rotted and failed wood posts. The PGT is suitable for standard applications as well as corners and splices. Note: The image here is for the series. The actual item may not be an exact match with the image shown, but should be similar. See Simpson site for particulars.