The convertible Toughbook 18 is tough times two. It easily converts from a powerful notebook PC to a convenient tablet PC with one quick swivel. It's wireless and fully-rugged either way. The Smartronix Stress ReliefTM provides the PC Card protection needed for a rugged laptop intended for heavy use in the field. The Stress Relief protects PCMCIA cards and their fragile connectors from damage during operation. The connections to PCMCIA cards become weak points in an otherwise rugged and durable computing system. Our Stress Relief removes this weakness by clamping onto the case of the computer, covering the PCMCIA cards and providing rugged connections to replace the vulnerable ones. Because the Stress Relief clamps to the computer case with no modifications necessary, the warranty is not voided and the computer system can be returned to its original configuration at any time.