PB Swiss Tools 9/64" Hex Key L-wrench, long-type, chrome-plated,PB Swiss Tools,PB SWISS TOOLS" /> Every PB hex key is held to tolerances less than a human hair for perfect dimensional accuracy. A longer handle and shorter key allows you to comfortable reach more inaccessible screws. PB's spring steel, despite a hardness of 58-60HRC, allows toughness/elasticity in its hex keys. All PB Swiss Tools are 100% Swiss-made. Every PB Swiss Tools product comes with an unlimited lifetime guarantee.