The "Master Lock Speed Dial" has received quite a bit of attention, so you can find much more information about it using Google. Unfortunately, I find Master Lock's web site is a disaster. I could not find it there. I got so disgusted I gave up!
You can open it up by feel. You can open it in the dark, with gloves on, or while covered so those watching can't get the combination.
It comes with a 4 motion combination, different ones usually come with a different combination. The combination is hidden in the holder when you buy it. You have to cut opened the holder to get the combination and you have to use the combination to get the lock off its plastic holder. Make sure the combination has not been removed before you buy it. I didn't so I have one I can't get off the holder or use.
If my calculations are right there are only 256 different combinations using exactly 4 motions, so with the number they produce they can't all have different combinations. For many simple applications the original combination may be adequate.
You can reset the combination, and it can be as simple or complex as you like. You can set it to require as many motions as you want. For easy opening among a trusted group you could require as little as just one motion. Later you could change it to something more complicated.
A nice consequence of this is: If you have more than one lock, you could set them all to have the same combination. You don't have to remember lots of different combinations.
The price is not bad. I found them at Rite Aid drug stores for $9 and at Staples for $10 and at Target for $11.
They imply the security is three times grater than for the regular combination lock. I am not sure how they came up with this, but I could believe it is about right. It seems quite robust, but of course any paddle lock could be cut off. Sometimes that is a desirable feature!
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