Simpson Strong-Tie Pipe Grip Ties make it easy to attach wood fence rails to metal fence posts. Galvanized fence posts typically last longer than wood posts, extending the life of the fence by helping to avoid the common problem of rotting fence posts. Now you can get the look of a wood fence with the durability of steel posts. The PGT is suitable for standard applications as well as corners and splices. PGT® 12-Gauge ZMAX® Galvanized Pipe Grip Tie® for 1-1/2 in. Pipe (Pack of 50).