All Equalizer® Blades have the correct Rockwell hardness so they will not buckle inside the sheath. Each serration is also serrated which gives a smoother and faster-cutting action. These blades will fit any Equalizer® tool, including the Excalibur® which is still available as well as the discontinued Equalizer® GT, Equalizer® Magnum, Magnum XP, Thor™, Equalizer® 12V, Equalizer® Freedom and LiveWire™.