Teng Tools TBNS15 Impact Nut Setter Set 5pc: A set of 5 impact nut setters for use with impact power tools. S2 steel material with HRC50-60 hardness. The new design creates even higher torsion for easier use. A recessed magnet holds the fastening (ferrous material only). Supplied in a handy storage case. TBNS15 Impact Nut Setter Set Features: S2 steel material with HRC50-60 hardness The new design creates even higher torsion for easier use Supplied in a handy storage case What is included: 1/4" hex drive 65mm length: 1/ 4", 7, 8, 10, 13mm nut setters