The Webster Lite 2 Adjustable AP/SP Anti Tipping Stabilisers are used to prevent the patient from tipping the wheelchair. Stabilisers are helpful when getting out of the chair and these prevent the chair from tipping. There is a very high risk of tipping wheelchairs without using stabilisers as most of the weight is then transferred to one side. If you order 1 of this item, you will receive a pair of stabilisers.