A method for determining a strain hardening property of a pipe enabling reduction of costs while ensuring pipeline integrity is provided. The valve cover assembly includes a valve cover body formed from a first material and an attachment member formed from a second material and attached to the valve cover body. The policy manager determines a policy for the virtual machine, receives a request to access a device from the virtual machine, determines if the virtual machine is permitted to access the device based upon the policy, and if so, permits the virtual machine to access the device. Golf clubs including these club heads and methods of making such golf clubs and golf club heads also are described. This enables designs that separate secure key management from the application-specific use of the keying material, and enables the rigorous evaluation of the key management module.