Tsourkan Knives 15 cm 52100 honesuki This knife has managed to exceed every one of my expectations. Weight is 151 g. The edge is exactly 150 mm, and the OAL is 275 mm. The spine is 3.30 mm as it enters the guard/bolster, 3.20 mm over the heel and 1.95 mm at the point where the kiritsuke-style tip begins. It has a maple handle with blackwood accents (inspired by Michael Rader's work) and a brass guard/bolster. The back side of the blade is very subtly convexed, not flat. It is one of the finest examples of Marko's craftsmanship and attention to detail that I have had the pleasure to handle.