他有几个系列啊, 我就记得一个了, 我看看 Contact Tool Tales North American Warranty International Warranty Register Your Product Maintenance FAQS Frequently Asked Questions General Tools Knives What kind of steel do we use for our knives? Why? How does this steel compare to other steel types? What styles of blades do we offer? What are the blade angles of our knives? What materials (and percentage of each) are our knife handles made from? Why did we choose these materials? What process does each style of steel go through to make a knife blade? What are the benefits of lockback vs. liner lock and vice versa? What finishing process do the blades have? What does Leatherman recommend for sharpening knives? Please describe the types of uses appropriate for our knives; i.e., were they designed with specific activities in mind? What are the grinding styles of our knife blades? What kind of steel do we use for our knives? Why? How does this steel compare to other steel types? Crater series: 420HC US made, from Crucible Metals. 420HC is used because it has good edge retention (stays sharp), toughness (it's not brittle), and is corrosion resistant. Expanse series: 154CM US made from Crucible Metals. 154CM is used because it has even better edge retention, toughness and corrosion resistance than 420. We have used our CATRA edge retention test equipment to compare 154CM to 420, and the 154CM holds an edge approximately 3-times longer. Rockwell hardness by steel type: 420HC: 55-59 154CM: 58-60 S30V: 58-60 Other blade steels: 440C is commonly used for knives and has gotten somewhat of a bad name for its ubiquity. ATS-34 is another common high-end steel; it is basically the Japanese version of 154CM. S60V is another premium steel with superior edge retention.