Coyote Control
Medeco locks are about the best thing out there as far as a key type lock goes. They are a pain in the arse to get extra keys for though. Some retailers have their own keyway, that being the groves on the sides of the key, that they buy from Medeco. In those instances you have to go back to that retailer to get extra keys made. No one else can buy that key pattern, and that keeps you locked into dealing with that retailer. That also lets him set his prices to anyplace he wants to set them to. The company I work for charges up to $15.00 per key! That is the down side. The up side is that they are almost compleatly pick proof. The pins inside them all have to be lifted to a common shear line. This is done by the cuts in the key raising the pins to the top of the plug, or the small circular part with the key hole in it. They also have to have a rotation match at the same time. Look at the cuts in the key and you will see that they are cut on angles that shift right, center and left. Another way they are protected, is that at the top of the key hole, there are two hardned pins on either side of where the key goes into the lock. If one was to try to drill out the key hole, their bit would break off in the lock, and now you have to deal with that little problem. You have also just wreaked the cylinder, because now you can't get the key into the hole. They are VERY good locks indeed. I have Medeco's deadbolt locks on my home. Wouldn't have any other lock at any price. They should last for many many years on a safe, and give you no trouble in you lube them about once a year. THere used to be a product on the markey that was perfect for Medeco products. It was a dry spray lube called Poxy Lube. I haven't seen the stuff in years, but it was the best. You could use WD-40, but after about six months, the cylinder will get gummed up and you will have to spray them again. For what it's worth, I use WD-40 on my deadbolts. It won't hurt anything, it's just a little messy.
Good luck.
John