I would not subject a compass to the trauma it might receive on a knife. I stay away from hollow handled knives with compass in the butt cap and knives with compass pouches. To start off, a compass is a precision instrument regardless of how much you pay for it. Contact or exposure to anything metalic can mean the difference in finding your way home and a total misreading of your bearings. In addition to this, a knife blade with a compass would mean the compass would possibly get damaged in chopping or(if liquid filled, which most are)could possibly leak. Carry the compass around your neck or on your belt but far away from the knife. Also be weary of reading the compass close to your belt buckle since that can throw you off too. Best of luck buddy.