For the counterweight mass - does the mass of 0.5 kg (light) and 1.5 kg (heavy) include the mass of the 1" open hook bolt? Reveal Questions Yes, the counterweight mass includes the mass of the open hook bolt. ‹ Can a 1'' eyebolt be used instead of the standard 1'' open bolt as described in the Storm the Castle Counterweight instructions listed in the event supervisor resource on the national website. How is an Event Supervisor to interpret the word "appropriate"? ›