Digital Door Lock M210 Mechanical Keyless Deadbolt, Marine Grade

UPDATED: 2 years later! It's been in daily use in hard conditions in Alaska which means summer temps of 90 F to -30 F. and it still works...kinda. It tends to be temperamental for no apparent reason (it's not like it's moisture or temperature related). Most importantly I've learned that as a mechanical lock - it doesn't matter on the actual sequence on the combo...just as long as you get all the unique numbers pressed you're good. We didn't discover this until a few months so we're not sure if this is something that occurred after some wear or if it's something that occurs with all mechanical cipher locks (I suspect it is with all cheaper ones anyway) but it's something to consider. But still, I'm glad we purchased it and I'm fine with the purchase and stick with the 3 star rating as a serviceable product that performed adequately.ORIGINAL: After much research on mechanical locks; I bought this one because it didn't directly SAY it wouldn't work on a predrilled standard door. To be fair - it does work; but the black rubber gasket is the only thing covering the entire predrilled deadbolt hole.We installed on a new metal door that came with two predrilled holes. My husband redid the combo without trouble. The trouble came with install and resulted in swearing, irritation, and a sliced thumb.IF you're wanting a cipher lock on a standard predrilled deadbolt you'll need to decide if you're OK with the gasket covering the hole OR I suggest a metal plate behind it. Something like a big washer (3"?) if you find such a thing. I'm attaching a pic with how the hole is covered...the gasket is what covers the hole.Construction seems to be solid and sleek. Instructions were clear enough. For our purposes of a cipher lock on a heated shed; it'll work fine.

I had a normal kwickset deadbolt on my door with the large hole. See the pictures.The deadbolt part fit perfectly and so did the door jam plate.You need a 9/16 drill bit and a phillips screw driver to install in the existing kwickset style door.The template is worthless for using a door that is already cut for a kwickset deadbolt, you can just throw it away.1st I had to use the side of the drill bit to carve a half hole on the bottom of the circle already cut into the door.2nd install the bottom "screw extension" only and the "pin".3rd put the rubber gasket on the front and hold the front lock on the door.4th install the lock bar and back plate. Install the bottom screw only.5th Shut the door and test the lock to make sure it locks properly and leave it locked to help hold the lock straight.6th Now make sure the back (inside house side) is straight and even on the door.7th Mark the top screw hole with a pen, marker, or just a nail.8 Remove the lock pieces.9 Now using the mark you made for the top screw hole, drill the hole through the door with the 9/16 drill bit.10 Before I installed the door knob, I opened the back and set the code.11 I stuffed some wall insulation in the original large hole around the deadbolt slider and then put a bead of caulk around the large hole and the small one I drilled to help seal them against the rubber gasket.12 I held gasket and front (outside part) of the lock on the outside of the door pressing it into the caulk.13 I put the back (inside part) and gasket on the other side and installed the bottom screw.14 I installed the top screw.15 Tightened both screws all the way and the job is done. Then test again.I tested it a few times and it works great.This deadbolt will stay unlocked until you spin the knob to lock it just like a normal deadlbolt which is nice. I did not want something that auto locked.I highly recommend. Now I only had it in for an hour so I cant say how durable it is, but it feels durable. You can see what I did in the attached pictures. I took off one star due to it not having a template for an existing 'kwickset' style door and only having a template that only works with an uncut door. The only way to find the hole location to drill the top hole is by installing the lock with the bottom screw only an marking the hole for the top screw.

By Jiminy cricket, this here lock ain't too shabby. But sometimes when you is buying a girtup like this, you's has to twerk it into place. By Judith Shammellys momma's breath, I swear I ain't seen no booger like a cheese booger better than this little piece of oil and sunshine. My 9nly complaint is that I had to buy one of those there extensionista kits to make her saddle up and ride like a good girl. But that did her. She was sittin my 2 inch kangaroo like a harpoon in a whale pod during mating season. Of banana bread ain't your thing, well by golly letter slip on by, like a panther at night. But hose you a need for some jingly without baterieas, well this twirly roo oughta doer. (Translation, good for a normal door. Love that I don't need batteries, but had to buy an extension kids and then just realize mechanical code locks like this don't have to be pushed in the right order, so if you're an emplo6 at fort knox looking for a lock to the vault, well this shouldn't be your first choice. 42nd? Sure, but not your first.

This is a solid, well machined piece both inside and out. Purchased as a backup and alternative to un-/locking a high traffic dead bolt.Points of issue;1. The combination system, as mentioned elsewhere, is the weakest link and I'd give the lock 4 stars if not for this. Changing it is easy enough but because it will unlock with any number sequence (eg. combo set to 12345, opens with 54321) a lower number combination is better security...2. Small peanuts - The instructions were not as user friendly as they could be. If you've installed door hardware before it shouldn't be a problem though. - Supplied screws are short for a security feature, replaced with 3" length.