Use these posts with all 7.5' high fence. A Driver Cap is needed for installation. Dive the sleeve with your sledge and slip post into sleeve. This is our premium post system. The kit includes high-strength, 1 5/8” x 8' round black-coated steel posts, black post caps, and galvanized steel inserts (these eliminate any digging of holes or getting on ladders to drives posts). Use one of our Drive Caps to drive the sleeve into the ground with a sledgehammer and then just slide the post right in! Ultra Heavy Deer Fence Posts should be spaced about 15' apart. These post will finish at approximately 7' tall.