A good quality hazelnut cracker will last decades. BlackWalnutCracker.com extensively tests each brand of hazelnut cracker for quality and function. There are many cheap, foreign made filbert nut crackers that just don't hold up.
Heavy duty black walnut cracker for serious hazelnut crackers.
The Kinetic Kracker electric pecan sheller has been a consistent seller for us. The Kinetic Kracker is capable of cracking 1,560 pecans an hour. It does a wonderful job and is loved by all. (Once you get past the price!)
Get Crackin' makes light work out of cracking hard shell nuts. Great for pecans too!