Using a walking stick or crutch in snow or ice can be difficult but this ferrule is perfect for the end of walking sticks or crutches in the Winter weather. It has a retractable spike which provides a firm grip on snow, ice and other outdoor surfaces. The spike flips up and down with a simple movement and can therefore be kept retracted during the summer months or while indoors. Made in Sweden. Available in two sizes to fit most UK walking sticks and crutches: 16-22mm (0.62-0.88 inches) 21-27mm (0.81-1.06 inches)