3mm, 4mm, 5mm, 6mm, 8mm, and 10mm 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.