THE Aircraft Circuit Breaker Safety Lockout/Tagout Tools! Skylox and Isolox are divisions of Kascar, LLC. We are designers and manufacturers of a comprehensive line of aircraft circuit breaker lockout/tagout safety tools. The line of products includes the standard Skylox tool which fits most common circuit breakers, the Large Skylox for use on larger circuit breaker barrels and Isolox are designed to fit over colored collars. All Skylox products are proudly manufactured in the United States and have been included as preferred methods in military and commercial maintenance procedures. Over 3.2 million Skylox tools have been sold worldwide. Kascar, LLC is also a major supplier of parts and accessories for the HMMWV and other military vehicles.