MetroMax Post Clamps by Metro Save 19% Original price $26.00 Current price $21.00 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart MetroMax Post Clamps, Part #: 9994X MetroMax Post clamps add stability by joining posts of two separate units together. With it, each unit is supported by four posts and buttressed by the adjacent unit.