Material: The housing and screw-on plate of the design swivel castor are made of solid, galvanised industrial steel. The wheel is made of floor-protecting solid rubber. Technology + Design: The stylish design caster transforms furniture into exclusive design uniques in the twinkling of an eye. The soft tread of the wheel ensures scratch and streak-free mobility on all hard/sensitive floor surfaces. The attachment is quick and easy: Simply screw on - and roll off.