The 100mm x 100mm powapost flush bolt post shoe is designed to make installing your fencing easy and quick this flush fit bolt down shoe is suitable for installations where a post requires fitting against a flush surface or needs to mounted on top of an existing wall or inline with the edge of a patio or deck this accessory is easy to use and will make your garden fencing very strong using the flush bolt down post shoe mark where you want your post to fit then mark each hole using the post