Our safety poles are made of galvanized steel and are 1040 mm H x 40 mm x 2.2 mm wall thickness. They have a gravity lock on the top that allows two braces to be attached for use in a linear fashion or at a 90-degree angle for corner applications. Two gravity locks are located midway at a 90-degree angle to facilitate the mid brace. Net result is a very versatile pole allowing use in the middle or any corner. Braces attach at a knee height and waist height.