– 10mm – Nut setter has a standard 6-sided design for use with sheet metal screws and other hexagonal head fasteners. – Uses a rare earth magnet that is 4 times more powerful than common magnets. – 1/4-inch quick-change shank, they’re designed to work with all types of impact and rotary drivers. – Tool-grade construction is suitable for most general-purpose fastener-driving needs. – Heat-treated chrome-vanadium steel construction with sandblasted finish for increased hardness and corrosion resistant.