Improve the stability of your freestanding wire shelving with this optional accessory. Threading into the bottom of our1" round chrome posts, triangle footplates replace the standard leveling bolts with a base for fastening your unit to the floor. Includes (4) triangle footplates Optimized for Shelving Inc. brand posts, designed with 12 threads per half-inch (see Product Details section below for more information) (3) 1/4" pre-drilled holes for anchoring wire shelving unit to floor 1/2" threaded bolt, 12 threads per inch Recommended for stabilizing narrow or tall solutions FREE SHIPPING.Ships Next Business Day.