Heavy Duty Nutcracker

As it turns out, from an engineer's perspective there are not a whole bunch of viable nutcracrackers out on the market.

First there are the are the decorative wooden figures that are virtually useless.
Next come the hinged ones from cast aluminium. They do their job quite well for walnuts and maybe hazelnuts. But anything harder like almonds or macadamia? Not so much! I managed to kill as many as 3 of these with almonds last season.
And last there is the threaded design. You can find it