From the gyuto vs. laser thread (http://www.kitchenknifeforums.com/showthread.php/4904-Gyuto-Mighty-vs-Laser?highlight=laser) I agree with tk's comment: "Frankly, this is very subjective but generally speaking, a 240 gyuto that has a maximum spine thickness of ~2 mm with full distal taper is a laser. Anything that is forged will generally not be a laser because people will look at the spine over the heel and and the thickness will exceed 3 mm."