It has a lockable tab on it that flips over to lock the door. It was cleverly designed to be reversible for left or right swinging door. An old screw set is included. The latch is 7 1/2" long and 2 7/8" tall.
The twist knob sticks 2 1/8 out from the back plate. I use plenty of pictures from all sides so look closely at ALL the pictures.
Please REMEMBER, Tracking numbers don't update daily! Doing that is against U. _gsrx_vers_801 GS 7.0.8b6 (801). The item "Gate Barn Door Latch vintage 1908 patent ALLITH PROUTY Co DANVILLE cast iron" is in sale since Tuesday, April 18, 2017. This item is in the category "Antiques\Architectural & Garden\Hardware\Door Knobs & Handles".The seller is "rlmartinmanor" and is located in Millersville, Pennsylvania. This item can be shipped worldwide.