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ASF-Keystone has developed a slackless system for joining multiple unit cars. The system incorporates a gravity actuated wedge arrangement which maintains a slack-free connection. The ASF-Keystone® slack free drawbar systems are available in horizontal key and vertical pin, fixed and rotary applications. Each system acts as the replacement for a pair of standard couplers, yokes, strikers and draft gears. The drawbars are made in America.