Manufactured from Chrome Molybdenum steel with a polished satin finish. Removes rusted, damaged and severely rounded hex head fasteners with ease. Patented twist design on short-arm grips tighter as they turn preventing fasteners from rounding. Keys range in length from 88mm to 225mm and in size from 1.5mm to 10mm. Ball-end allows key to drive fixing at up to 25°. Supplied in easy-access case with hanging tag for safe storage and quick key selection.