A shoehorn or shoe horn (sometimes called a shoespooner) is a tool that lets the user put on a shoe more easily. It does so by keeping the shoe open and by providing a smooth surface for the foot and the heel to move, without crushing the shoe's counter (the vertical portion of the shoe that wraps around the back of the foot), in this way acting as a first class lever. Originally, shoehorns were made from animal horn,[1] or hoofs, and some made from bulls' hoofs are still available for purchase. Today plastic, metal and wood are most often used. They were also made of glass and even paper. Expensive shoehorns were made from ivory, silver, shell, or bone.