Commercial Grade Foot Plate; Fits 1 5/8" & 1 7/8" diameter pipe; Marine grade hot dipped galvanized finish for long life. The design of the foot plate has 2 features to help you install on a sandy or muddy bottom. One, You can allow the dock pipe to protrude through the bottom of the foot plate and sink into the lake bed. Two, The foot plate has holes in all 4 corners which enable you to attach additional material to create a larger surface area if needed.