This is the Koah Standard 4.5 Inch Dive Knife with Magnetic Sheath Features: The Koah Standard Dive Knife is Italian built from high quality 420 Heat treated stainless steel. It has a 4.5in blade with half serrated and have smooth blade with razor sharp tip. Best part about this knife is the effective magnetic Sheath which allows you slide and secure your knife in without using the typical rubber security strap. The Koah Standard Dive Knife is Italian built from high quality 420 Heat treated stainless steel. It has a 4.5in blade with half serrated and have smooth blade with razor sharp tip. High visibility Koah Orange handle and Teflon coated blade. Best part about this knife is the effective magnetic Sheath which allows you slide and secure your knife in without using the typical rubber security strap. Two rare earth sealed magnets keep everything in place. Knife comes with necessary leg/Arm adjustable rubber straps and replacement clips.