This is the sharpest, and strongest replacement razor-blade knife available, with blades that change safely and easily at the push of a button. The black-oxide coated blade holder supports the razor-blade for the strength of a standard knife and sharpness of a surgeon&';s scalpel. The double molded GrivoryA(R) handle features rubberized TPR inserts for a non-slip grip, even when wet. The double sided thumb stud allows easy, one-hand opening and the replaceable pocket clip contours with the handle so it feels like an integral part of the grip. Specifications Blade Length: 3.0" Overall Length: 7.0" Blade Steel: Japanese 420J2 stainless steel Blade Hardness: 57 RC Handle Material: Grivory (glass/nylon) with rubberized TPR inserts Weight: 2.0 oz.