The tubing cutter (less expensive of the two) works fine for most metals. Don't try and cut carbon fiber with it though. Just go easy on the pressure and you'll have no crimping problems. So parts are such thin wall you need to be careful no matter what you use. A little oil/WD 40 etc helps also. Get a fine tooth file to get the burrs off and have fun. You can get them at just about any home improvement store.