2210OIL Keyless Entry Deadbolt - Mechanical Smart Lock for Home Security | Secure Front Door, Back Door & Apartment Use

I've had this a couple of years and it has worked consistently. It is not exposed to the rain where I have it. I got the black finish and the finish has held up well to finger prints and children. The expansion kit is well worth it to have a code with more than 3 digits. I think this is important because the number you choose for your code can be entered in any order to make it open, therefore 4 or 5 digits is harder to guess than three.