UFP Lock Out Cap A-60, A-70, A-75 & A-84 Lock Out Cap. Replaces Plastic Outer Member Cap, Mounts On Outer Member And Is Turned To Lock Out Brakes When Backing Up. This Is An Optional Item And Is Handy When Backing Up Inclines. Reference #32 in Model A60, A70, A75A & A84 Schematic.