This full tang tactical neck knife from Master USA measures 6.75" overall and has a 3" stainless steel drop point blade. This neck knife comes with a plastic sheath that has a whistle blower built in. This knife is always within easy reach and the whistle is one of the best signaling devices if you are lost in the woods because it takes very little energy to blow and can be heard all around for a good distance. This knife is perfect for anyone who enjoys spending time in the outdoors.