Grip-on Chair Raisers, suitable for use with furniture on castors or legs, these raisers grip on to the furniture using the unique 'donut'. This greatly increases safety as the furniture raiser is attached to the furniture rather than the furniture simply sitting on the raiser, as with some other models. Raisers are supplied in a set of 4. To raise 25 mm (1") one set is required, 2 sets are required to raise 50 mm (2") and 3 sets are required to raise 75 mm (3"). Available to fit several widths of castors/legs. Maximum user weight 500 kg (78 stone) (including furniture).