There are two types of hand operated benders: hickeys and hand benders (or one-shot benders). While both are usually iron, hand benders are also offered in aluminum. The real difference between them is the size of the head. Hickeys are 60% smaller then benders allowing the user to make very tight bends close together. As a rule of thumb, you would use a hand bender the majority of the time and save the hickey for when you have to make a number of very tight bends that a hand bender simply couldn’t do. Hand benders, however, have the advantage in that they have degree scales and bending indicators etched on the side to aid in the bending process. The One-Shot bender got its' name because you can make a 90 degree bend with a single motion.