1.5mm, 2mm, 2.5mm, 3mm, 4mm, 5mm, and 6mm Hex Wrench Set, Park Tool Fold Up Hex Wrench Sets use a multi position composite handle that is comfortable, lightweight, slip-resistant, and 40% stronger than steel handles. Hexes have chamfered tips for a perfect fit and are made from Bondhus Protanium¿ high torque industrial steel for long life.