This wera hex key set has features that allow more torque to be delivered dramatically reducing rounding out in the screw heads and for more comfort during use the keys are made from strong round bar and the plastic sleeves deliver more comfort the rainbow spectrum allows quick and easy selection weras patented hex plus profile allows up to 20 more torque without damaging the fastener supplied in a button opening tool clip that holds the keys firmly but allows easy tool selection this 9 piece s