Check the listing for details. TL 822, thumb turn latch, marine hardware. Condition: New. Listed at 6.15 USD. TL 822 7/8″ 7/8″ 11/16″. Latch # A B T. To install, drill 3/4″ hole, drop latch in and fasten body nut. That’s it. Perfect for easily and quickly securing hatches that don’t require high security. Ball and spring detent create a firm and definite positioning when actuated.