This knife is a flagship of the sheath knife of ROCKSTEAD. The shape of our blade is made from a consecutive convex surface. This is a technology that doesn't permit others to follow, and we have confidence in this surface. When you strongly press this knife against the telephone book, it will cut like cutting butter. Please confirm our HONZUKURI blades that evolved. The handle of the UN can be detached. We are developing new practicable handle attachable to this knife. The blade of YXR7 to which DLC is coated is strong with the beauty. After chopping and cutting a hard tree by this knife, you can slice paper with ease. It is a knife of this type that cuts the bamboo in the movie of our Web site. Choose the color of the silk handle cord from among these four colors: KINCYA, UGUISU, TETSUKON and AZUKI.