Review on Unlock Versatility with Momentary Switch Keyed Removable Position by Samiran Pusarla

I bought seven of these for my condo to allow DHL, UPS and Fedex access to our lobbies. They need the same keys (1 key to master them all). Overall length 2.05" including tongue. Bolt head thickness 0.25", diameter 0.83". Threaded barrel length 0.9". Barrel length is approximately 1.35". Spacing between barrel flats is approximately 0.63". Firstly, a Medeco "double D" anti-rotation washer will not fit without some grinding. Too bad they can't come with anti-rotation washers or plates. Suzo-Happ sells lock washers for wood products. I will grind the Medeco washers that I already have.