p style="margin: 0px; text-align: justify;">The materials used to make crutches must be sturdy in order to efficiently manage the weight of the users. Crutches are mostly made of tough metals, like aluminium or steel-reinforced aluminium for heavy-duty use. Traditionally, some underarm crutches are still made of wood. Some metal crutches can have a coloured paint finish. It is necessary that all crutches are fitted with an appropriate ferrule. The ferrules of metal crutches must incorporate a metal ring so as to prevent the base of the crutch cutting into the rubber of the ferrule.</p