18Packs 27.4 in Chain Link Fence Extenders These fence post extenders boost the height of your garden, yard, or pet enclosure-ideal for increasing privacy and preventing pets from jumping or escaping. Made from heavy-duty steel with powder coating, they're built to last outdoors. Comes with all installation hardware for fast setup. Compared to standard U-brackets, the enhanced design fits a variety of round rails (1.3""-1.5"") and conforms tightly to the curve.