The Series 17 Checkmate is the latest state of the art, point of operation guarding device that provides economical, reliable protection for operators of riveters, spot welders, clinchers and small staking presses. The Checkmate is available in models for use on full or part revolution riveters using either air or electric power. The unit interfaces with existing electric or pneumatic machine controls, and is available in either right or left hand configurations for easy placement and installation. The Checkmate can also be integrated into foot treadle machines using the optional actuator conversion kit.