For single-leaf tubular frame doors, change function E to an integrated "inserted key" function. The forend is stainless steel measuring 24x3x245 mm, with a 9 mm follower one-piece. The latch can be reversed and is supplied in DL, with a 1-turn deadbolt throw of 20 mm. The lock case is completely galvanised, and both the latch and deadbolt are nickel-plated, featuring through screw holes. Installation must be carried out in accordance with the manufacturer's instructions.