I bought a Bolt and gave it a thorough look over. Hopefully this information will help to someone in the future. I've found Havalon's website and customer service to be lacking. The Bolt has a 4 5/8" handle and weighs 1.5 oz w/o a blade. The Edge has a 4 3/8" handle and weighs 1.4 oz w/o a blade. I find the Bolt to have a more secure feeling in the hand because it is more contoured and slightly longer. I have three different blades. The 60A weighs 0.08 oz w/o wrapper, 60XT weighs 0.07 oz w/o wrapper, and 22 weighs 0.04 oz w/o wrapper. The 60A and 60XT have 2.5 inch blades and the 22 has a 1.5 inch blade. All three blades fit the Bolt very well. The Edge will fit a 60XT very well, a 22 is slightly loose, and a 60A will not fit (too tight). The general on-line consensus is that the 60A are stronger and better for larger animals compared to the 60XT. The 22 is suppose to be thinner than the 60XT, but it appears to me it will be less likely to break than the 60XT because it is shorter. It has less flex on the knife handle.