Adjust each jaw on these chucks separately to hold rectangular or odd-shaped workpieces. Also known as independent chucks, they have four jaws that each have their own adjustment screw. For quicker setups, you can also remove two jaws and clamp with the remaining two. All jaws are reversible, so you can install them for either an inside or an outside grip. Use the included wrench to move them in or out. Made of forged steel, these chucks are strong and wear resistant, so they maintain their shape even with continuous use. They’re often used for precision machining. They last longer than cast iron chucks, and you can run them at higher speeds.