* Clearance Price - Final Sale - Limited Quantities Available * The wedge is one of the simplest of the simple machines, but it is capable of great force amplification. The motion of the wedge into the space between two boards is converted to vertical motion of the top board. Small taps on the wedge can lift very large weights. There are many good experiments that illustrate quite clearly just how the wedge does what it does. Made of durable hardwood. Desktop sized.