Bed Stopper 'No Lift' is the perfect solution to stop castor wheels rolling. Critically there is no need to move or lift the bed to trap wayward castor wheels. Simply slip the 'No Lift' Bed Stopper around the castor wheels (open end to the outside), squeeze the two arms of the bed stopper gently and your castor wheels will not move. Easily removed when you wish to move the bed. Discount for set of 4.