Lockey Digital M210 Mechanical Keyless Entry Bump Proof Deadbolt Door Lock Satin Nickel Finish

I’m writing an updated review because after 8 years of use, this deadbolt is still working perfectly. It was easy to install and has been exposed to harsh weather conditions in a tropical climate (strong sun and heavy rain) with minimal impact. Aside from a few minor cosmetic stains, it has held up extremely well. You do need to be careful when changing the code, as there are small internal pieces that can be easy to misplace, but once set up, the lock requires virtually no maintenance. About once a year (or every couple of years), I simply clean it and apply a bit of WD-40 to lubricate the mechanism and help prevent rust. In a time when many products don’t seem to last, this deadbolt truly stands out for its durability and reliability. If I ever needed another one, I would absolutely buy this again. The value for the money is outstanding.

My unit came with an extra red "code" pin which allowed me to increase the number of code digits to 5. That is, 5 out of 12 number would need to be guessed. Also, the number of combo digits would need to be guessed, which further expands the problem space and thus the inability for one to "crack the code". As others have mentioned, it actually does not matter what order you enter the numbers. You can even enter number simultaneously which I actually like. It makes it faster for me to enter the code; instead of 5 presses, I just do 3 -- two of the presses involve two simultaneous digits. If you want to calculate how difficult it would be to crack, you would consider this a combination (i.e. n-choose-k) as opposed to a permutation problem. Traditional keys can be bumped or picked, though there are now bump-proof locks. At the end of the day, all household door locks are deterrents. If one were determined to get into your home, he/she would simply kick the door in or break a window -- easy enough. You might be better off securing your high-value items in a safe that is bolted to the ground. This thing is made in Japan; it ain't cheap to manufacture there. I'm no metallurgist but I suspect that the machine screws are stainless steel. The bolt is machined brass. Build quality is amazing. Even the stamped parts are very precise. The word "digital" the is casted into the front is cheesy as hell but it is just an "engrish" moment IMO. In Japan, I'm sure they think it is cool. In the U.S., it just looks cheesy. You will be able to adjust the left- or right- handedness of the unit depending on how your door is hung. It will require unscrewing a few screw and moving a pin. They even provide you a pair of tweezers (also used to set the code pins). All internal components seem very well crafted. Yes, I said "crafted". This thing was most certainly required human hands to assemble. There are QA stamps and screws are color coded to aid in modifying the unit. no batteries required. purely mechanical. Possible downside for others....configuring the unit was somewhat involved. This is no plugin-n-play thing. It is no Apple product. I am an engineer by trade. Let's just say that I made a fantastic evening out of messing with this and figuring out how it all works. Not all will enjoy doing this. overall a fantastic product.

Love it! Instructions were clear. It’s easy it’s simple and it works and it’s reliable. I have 2 of them. It fit right in my original dead bolt hole. So no need for drilling etc. the lock is smooth and I had it for sometime now and I am really impressed.

This is slightly difficult to install. While it does require drilling a top mounting hole, that's not the problem. I've installed 3 of these and had the same problem on all three. The distance between the bottom bolt and the spindle is slightly wider than the radius of a standard door lock hole. So I had to drill out a little more material at the bottom of the door lock cutout. If you don't do this, the lock will bind and will not open/close smoothly. Changing the combo is not difficult, but does require you to CAREFULLY remove the back screws. I recommend a mini screwdriver for this, not a standard #1 or definitely not a #2 Phillips. Those will strip the screw. You'll need to push in hard and turn slowly too to avoid stripping the screws. It's a bit annoying to have to remove the entire lock to change the combo, but I likely won't be doing that often, so not too big of a deal. While others pointed out this lock could be hacked, it would likely take longer to do that than to find some other way in, so that's not a strong concern. This is a Grade 2 lock though, and I could see if feasibly being pried or hammered off somewhat easily (most dead bolts can, so don't panic about this one in particular) because of it's shape. I got this because thick lock cannot be picked or bumped. I'm not too concerned with picking because that takes a while and takes some skill. But bumping takes very little skill and only about 5 seconds with most locks. Only a few locks are adequately bump resistant, but still, anything with a key is a security risk. If someone wants to get in (illegally), I don't want it make it easy. These are made in Japan. I didn't think anything was made in Japan any more! Nice! Beware of Chinese knock offs saying they're made by Lockey, especially on eBay. They might look similar and function similarly, but but beware. This is the real deal.