This bi-fold door pivot wrench is constructed of stamped steel and features 2 open-end wrenches and 1 box-end wrench. The open-end wrenches fit 5/16 in. and 1/2 in. square or hexagon shaped nuts and bolt heads, and the box-end wrench fits a 5/16 in. square or hexagon nut or bolt head. This wrench is used to adjust bottom pivots and brackets. This wrench is used with Prime-Line’s N-6932 & N-7107, and it is used by many bi-fold door manufacturers.