Sign mounting brackets, hardware, and accessories secure signs to posts and walls. Fence mounting brackets are used to mount signs securely to fences. Hitch mounting brackets are used to transform standard vehicle hitches into sign holders. L-shaped mounting brackets are used to mount signs to posts or poles at different angles. Post and pole mounting brackets are used to securely mount signs to u-channel and square and round posts or poles. Roll-up sign braces and accessories are used to provide stability to roll-up signs. Safety cone accessories are used to secure and stabilize cones and make them more visible. Sign frames are used to create a stable and secure way of displaying outdoor signs. Sign post couplers allow sign posts to bend or break during impact to minimize damage or injury.