The built-in, quick-release levers on these turnbuckles make it fast and easy to secure your truck bed camper to your vehicle. Designed for use with bed-mounted camper tie-downs. Turnbuckles extend from 14" to 21-1/2". turnbuckles covers your truck's fuel tank door. No need to manually twist an older style turnbuckle and remove chains to disengage the entire system. Just pop the FastGun handle up, unhook the turnbuckle so