One thing I keep hearing is that some older Channellocks seem to have been made heavier or hefty compared to the current production leaving people with the impression that older is better or heavier means stronger or some such. Personally I don't really notice any difference, but the reason others might could be due to the change in carbon steel grades or the type used in the past compared to now. Metallurgy has come a long way these days and their are grades of tool steel available today that are very strong, tough, and durable yet lighter in weight and can be thinner for equal charecteristics than the older steels. Just think of the old Diamond Calk wrenches. Some were made with Carbon Tool Steel and priced less, yet the higher priced wrenches were made with Diamolloy and alloy carbon steel that was lighter and just as strong. Some people also have the impression that thinner means weaker, not so. Many newer steels today can be lighter and thinner because they are stronger than some of the older steel used and provide the same strength, hardness, and toughness while using less material. Just my thoughts. I have no idea what grade or type of tool steel Channellock used to use 30, 40, or 50 years ago, but they do specify what they are using today on their website and packaging. Seems like a very durable steel today.