Professional heat treated Chrome Vanadium steel sockets. S2 Steel hex bits with a zinc phosphate finish. Removes rusted, damaged and severely rounded hex head fasteners with ease. Patented twist design grips tighter as they turn preventing fasteners from rounding. Supplied on a metal socket rail. Features & Benefits:Professional heat treated Chrome Vanadium steel sockets.S2 Steel hex bits with a zinc phosphate finish.Removes rusted, damaged and severely rounded hex head fasteners with ease.Patented twist design grips tighter as they turn.Prevents fasteners from rounding.Sizes: 1/4"Sq Drive; 3-6mm, 3/8"Sq Drive; 7-10mm.Supplied on a metal socket rail.Lifetime guarantee*.Model No. AK65600 Specifications: Model No AK65600 Brand: Premier Contents: 1/4"Sq Drive; 3, 4, 5, 6mm, 3/8"Sq Drive; 7, 8, 9, 10mm Drive: 1/4" & 3/8"Sq Maximum Length: 48mm Minimum Length: 38mm Nett Weight: 0.280kg