These knives are terrific if you need a blade that stays sharp! The blade is "snap off", which means that you can literally snap the end off; to give you a fresh, sharp section of the blade. The long blade comes with 13 snap pieces. There is a 2-part thumb plate that locks the blade into place, and a tool that slides off of the back of the knife for snapping the blade. The knife is just under 5" long with a 3/8" wide blade.