ShurLok SL-100W 4-Digit Combination Lock Box with Key Storage - Secure Blue Safe Box for Home, Office, Gym & Outdoor Use

This box is strong and nice looking.One feature I liked especially are the combination dials. They are white numbering on a black ring so the white numbers stand out well against the black background. A problem with some of these combination dials.There is a soft rubbery bumper pad on the back to protect paint on doors and the shackle is also coated with a soft plastic or rubbery sleeve.The box compartment for the keys is smaller than a lot of these boxes so you may not get as many keys in it. But if you are just putting a couple of house keys, or so, inside, it should be fine. (You may get a few more in if the keys are not too thick.)There are two combinations required.The combination to open the key door is different from the combination to unlock the shackle to hang it on something.You are able to choose either one of these two, and the unit sets the other one for you. So you can set the key door combination to a number you will remember easily but that leaves a different number for the shackle which is determined by what you set for the door. So that will probably be a rote memory issue for you.Therein lies the rub.Be sure to read the directions very,very carefully and be sure not to lock it onto to anything or put any keys inside until you fully understand how the combinations are set.I can't say this more urgently, it isn't for the mentally challenged, it takes some figuring out. (You'll need to plan to sit down for a little while and not rush into it and wonder what the combination turned out to be.)If you are in your elderly configuration, maybe this isn't the lockbox for you. But if your reasoning abilities are good, this is a fine lock and is less bulky than more traditional lockboxes.The problem is the confusion that arises in setting the two combinations. If you want to set the door combination to a number you remember you have set it in conjunction with the shackle combination. For example, the door combination will be 3 digits higher than the shackle combination. If the door combination is to be 555 the shackle is 222. You set the shackle combination first, (if I understand it.) so you write down the door combination and subtract 3 when setting the shackle.Complicated to write about, you'll get it when you get the lock and instructions which has a little table to help.To further complicate the set up is that in order to set the combinations, you have to turn a "setting screw" on the side of the unit to free the lock to set combinations. But if you forget to return the "setting screw" back to its original position, and try scrambling the combination, you are really resetting the combination to the scrambled number, until some day you remember to turn the "setting screw" to complete the process.So, while your are setting and figuring out the setting process, keep a pad of paper next you and write every combination you dial so if you forget to return the "setting screw" back to normal, you will have a list of possible settings on the pad that may open the lock and let you start again. Can't tell you how careful to be until it is set up. Don't put your keys inside or lock to a door until you have all this working properly. Then write down your combinations somewhere. (I put the shackle combination inside the key storage compartment figuring I may remember the combination to the box, but would probably forget the shackle combination.The reason for the two combinations, is actually not a bad idea. You can give the key compartment combination to some one and they can get the keys out of the box, but they cannot remove and misplace the lockbox without knowing the shackle combination also.Clear as mud! It is important that you read instructions and play with it for awhile to be sure you get it.I didn't give 5 stars because of the complications with setting the combinations in the beginning. You should only have this issue once unless you want a new combination.Good box, however.Steve