Prevent dangerous restarts of a host of different devices on the jobsite or in your workshop. When there is an interruption in the power supply to your device, Safety Gate™ Professional prevents spontaneous restart of your device when power is restored by requiring you to turn the device off and then on again with your device switch. This prevents tools from coming back on at undesirable times, which eliminates the risk of injuries caused by sudden and unwanted restarts. Safety Gate™ Professional Retrofit meets OSHA, NFPA and CSA standards for restart protection with power tools another high capacity devices found in the workplace. 15 amp maximum rating.