Cantled Edge: is the most widely used edge configuration. It consists of a final grind along the very edge of the primary grind. This final grind forms the sharp edge of the knife. One of the main reasons for its popularity is that the cantled edge is fairly simple to apply by hand or machine. It's also relatively easy to control the angle of the cantle to achieve a desired degree of sturdiness or fineness to the finished edge.
The Rolled Edge: has been in existence for over 1,000 years and has been used by bladesmiths all around the world. But today it is qui te rare in the knife industry. Some of the finest examples of this edge can be found on early Japanese Katanas. It consists of a continuous curve from the primary grind right to the edge of the knife. There is no "cantle" at the edge visible to the naked eye. The only knife that Cold Steel currently makes with a rolled edge is the Stainless Trail Master. A rolled edge is quite difficult to produce in custom quantities and practically impossible in full scale production. The reason for this is that it must be applied by hand, using a "slack belt". The honer must constantly monitor his progress very carefully to develop a perfect rolled edge. However, the result is a cutting edge that will easily outperform a standard cantled edge, because it offers almost no friction during a cutting stroke. It slips effortlessly through the cutting medium. Apart from the difficulty of manufacture, the drawbacks to this type of edge are that it is typically very fine. This means that it is subject to chipping if it comes in contact with very hard materials such as bone. It is also difficult to re-sharpen by someone inexperienced with rolled edges. The only recourse for this individual would be to send the knife back to Cold Steel for factory resharpening or to develop a cantled edge in place of the original rolled edge.