This print is a useful tool in electromagnetic physics and generic mathematical cross products. The goal of the design is to prevent embarrassment by eliminating the right hand rule (sticking your hand in the air and bending your fingers). It is also a quick and easy way to determine final vector directions in any given cross product. Engraved on the model are the variables in two important electromagnetic equations. One is QVXB=F and the other is QVXR=B.