From the Anvil Heavy Duty Latch 3inch - SSS
This tubular latch is especially designed for unsprung door furniture.
Backset: 2 1/8" (56mm)
It is ideal for our range of handles. It has both stainless steel and brass forend and striker plates. It is reversible and has a 8mm follower. Suitable for fire rated 30 and 60 minute doors. Available in three sizes and has the necessary fixing screws.