This ferrule is compatible with most ordinary crutches and can make using your crutch a more comfortable experience. It has been uniquely designed to offer you 50% more grip than a regular rubber ferrule, making your crutch feel more secure while using. It is also shock-absorbing, taking the impact when the ferrule meets the ground, which may reduce any pain or discomfort you feel in the upper body while using your crutch. It is also flexible, moving with you while you walk, with the bottom of the ferrule remaining in full contact with the floor at all times. This can improve your crutches grip on the floor, even on rough terrain, making your crutch feel more safe to use. This item includes one ferrule.