Post collars for 2 1/2 posts (round fence posts used in corners, ends and driveway gate support posts). These all black fittings are used to attach cable or fence ties to posts; they can be adjusted up and down the post in any position then tightened with a wing nut. These retrofit collars can be slipped over the side of a post. This is helpful for customers that want to add post cable collars after their fence is up without cutting all the fence ties holding the existing fence (standard post collars have to be slid over the top of the post). These are side mounted and not shipped with any of our fence kits, please ask any questions before purchasing - these are unique and specific for certain applications only.