Tuning fork A tuning fork was a type of tool that could be used to make a high-pitched sound when striking it. Doctor Gulliver had an electronic tuning fork that he used to cause the bullet-proof glass case of the Vanderbulge Star Sapphire to shatter. Green Arrow used Doctor Gulliver's tuning fork to shatter the glass jars that the Super Friends were trapped in. References ↑ As seen in Gulliver's Gigantic Goof (1973). ↑ As seen in Gulliver's Gigantic Goof (1973). ↑ As seen in Gulliver's Gigantic Goof (1973). External Link Tuning fork at Wikipedia Retrieved from "https://superfriends.fandom.com/wiki/Tuning_fork?oldid=59326" Categories: Equipment Community content is available under CC-BY-SA unless otherwise noted.