Large volume pizzerias that turn out hundreds of pizzas during a rush often have several pizza knives on hand to quickly slice the pies. This is the fastest method for cutting a pizza and both rocker- or straight-blade knives are available. Pizza rocker knives look like a half-moon and have handles on either end, because they are meant to be used with two hands. All the employee has to do is rock back and forth and in a circle around the pizza to quickly slice it.
A straight-blade pizza knife works a lot like the paper cutters in elementary schools and libraries. One end is held on the table while the handle end is brought up and down to slice through the pizza. Some knives even have a smaller handle on the far end to provide a better grip.