Greenlee 0254-31 Folding Hex-Key Set, Metric, 9-Piece Sizes 1.5, 2, 2.5, 3, 4, 5, 5.5, 6, and 7mm. One-Piece, powder-coated handle/case for corrosion resistance Laser-etched sizes on case for easy identification Heat-treated and tempered for extra strength and durability Exceeds ASME/ANSI specifications