Boon Edam announced that its Trilock 60 and Trilock 75 turnstiles have a completely re-engineered internal mechanism that operates more smoothly and with an exceptionally quiet operation during use, when the arms are rotating into the next position. The turnstiles are quieter than before because the interior ratcheting and locking mechanism (which controls rotation of the arms to allow a single authorized passage) now has a redesigned shape while maintaining a secure functionality.