Translation of "Pocketknife" in Spanish

Tom managed to cut himself while trying to open a bag of peanuts with his pocketknife.

Tom se las apañó para cortarse mientras intentaba abrir una bolsa de cacahuetes con su navaja de bolsillo.

The knife was so dull that I couldn't cut the meat with it and I had to use my pocketknife.

El cuchillo estaba tan mal afilado, que no pude cortar con él la carne y tuve que usar mi navaja.