This Zakuri 150mm Blue #1 Kurouchi Funayuki is a double-beveled knife.It could make a nice camp knife for food, a utility knife in a kitchen, or a really cool box opener ) So, for a couple of years we've been trying to figure out how we can carry some of his knives since we really want to only focus on knives that can be used for food. However, he's really talented and makes really great knives. He specializes in outdoor knives, and every time I ask, he does not want to make kitchen knives. When we visited the Tosa region, we met Komatsu-san and spent some time with him in his workshop. This Zakuri 100mm Kurouchi Utility knife was forged by Komatsu-san. Width of Spine 1cm from the Tip: 2.63mm.The black finish on the blades is called a kurouchi finish and is the residual scale from the forging process. The knife is forged from blue #2 steel with damascus cladding. So, for a couple of years, we've been trying to figure out how we can carry some of his knives since we really want to only focus on knives that can be used for food. This Zakuri 100mm Kurouchi Damascus Utility knife was forged by Komatsu-san. Blade Thickness 1/2 way between the Spine and Edge: 2.58mm.Width of Spine 1cm from the Tip: 1.67mm.The kurouchi finish does help protect the knife from rust a little. This knife is carbon, so it can rust if not cared for properly. The blue #1 steel takes a very good edge and holds it pretty well. for anything from chicken to fish, lamb to beef, this knife should work well for your boning needs. Sabaki bocho is a knife designed for boning. The handle is made of ho wood and is octagon shaped with a buffalo horn ferrule. This Zakuri 150mm Blue #1 Kurouchi Sabaki Bocho is a double-beveled knife.