MetroMax Post Clamps by Metro Save 20% Original price $24.52 Current price $19.60 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.