The XS Scuba Neuro Knife by XS Scuba, has a 4.5" (114mm) 304 stainless steel blade that is excellent for rust-resistance. The knife comes standard with a clip point style blade with line notch cutter. The black model (only) includes a blade with black chromium coating. The 2" (51mm) serrated edge along back of blade is great for cutting rope. Full tang blade runs the length of the handle for strength and rigidity. It protrudes out the back to provide a hammering function. Self-locking sheath provides an audible click" to confirm knife engagement. Attachment point on back of handle for added security. Includes two 22" (560mm) long rubber leg straps with quick release buckles. The knives plastic handle is ridged for a positive grip and is equipped with a wide hilt guard for added safety. The Neuro Knife has an overall length of 9" (228mm).