The Irwin IWAF342-3 Nutsetter Set is designed to give you maximum durability and corrosion resistance. This set of three nutsetters comes in black oxide finish for added durability. It is impact rated, so it can be used with power tools. This hex shank nutsetter set has 3 pieces each measuring 1/4″ Hex Shank Size x 1 7/8″ Overall Length. The 1/4″, 5/16″, and 3/8″ fastening sizes are ideal for use on various types of nuts, bolts, screws, and other fasteners. Each nutsetter has a tool insertion size of 1/4″. When you need professional quality tools that can handle the job, this Irwin IWAF342-3 Nutsetter Set is the right choice for you.