3 features are effective:
-Aiguisoir (Though the matter seems to be plastic, it works)
-Décapsuleur: Being very pretty, I let it out in the kitchen all the time, and since I drink some more beer passed since you can directly open the bottle ...
And the main function: it opens itself the tins (just position them), but I advise to put his hands on (or slightly below in support), especially for those heavy, otherwise it is not not necessarily stable. But fast, effective, and the magnet retains the "cut".
For the price, I recommend.