I use a Xikar. Got an all metal one several years ago and almost worry free. Tightened a few screws once and gave it a little oil maybe once a year. I always moisten first. Really want to get a Palio cutter. Not as popular as Xikar, but people swear they are the best. Only bite em if I have too. . Need to get a little punch for the key chain & no more biting.