A lowering device with a winch bar can be handy, but pay close attention to anchoring, brake control, and line entry and exit. Keep the load path clean and test with a small controlled load first. “Looks about right” is not much of an engineering standard here.
For a rope grab, match the device to the exact rope diameter and intended direction of travel. Make sure it grabs smoothly under load and releases without drama. Compatibility and inspection matter more than brand hype. If it’s life-support equipment, follow the manufacturer’s approved setup and...