How many Fence Extension Brackets do I need? August 13, 2021 03:32 Updated We recommend one bracket per fence post or a maximum of one per 3m. Related articles How do I use the Hardware Calculator? How to attach Fence Extension Brackets to Wood How much does a cat run cost? How to create a wire rope system for Colorbond Fences How to attach Fence Extension Brackets to Colorbond Comments 0 comments Please sign in to leave a comment.