The Spyderco Triangle Sharpmaker is a very versatile sharpening system. It can sharpen just about any knife with ease, including even serrated knives.
The Triangle Sharpening Rods are made of ceramic material. This material is a very durable sharpening material because it is so hard. We have found the medium and fine stones to be graded rather fine. In other words, this set is more fine than other sets with a medium and fine stones. The relative grit fineness does make sharpening a little longer but the results are worth the wait.
There are 2 knife settings, a 15 degree and a 20 degree setting. When you hold your knife vertical, you can easily sharpen your knife at these angles. There is also a scissor setting which is 12.5 degrees if scissor sharpening if your need.