Here is a handy tool that lets you crack nuts like a pro. The MENU Nut Hammer is pretty easy to use. Just put nuts inside the nut cup, attach the cup to the handle, and smash away. The nut cup keeps pieces gathered, so you don’t cause a whole lot of mess while using this.
The Nut Hammer has a silicone holder and a cast iron back to crack the nut. Just make sure you use it on even surfaces to get the best result.