Non-metallic, non-magnetic, affordable, lightweight blade. This is a kitchen knife and not designed to be used as a weapon. It's nearly undetectable because it contains no metal, only zirconia carbide and rubber. The sheath is thermoplastic, the cord nylon 550lb with a plastic pressure release clip. They are completely impervious to the elements (no rusting, warping, or falling apart with time). The zirconia blade ships extremely sharp and is harder than any steel in the world, meaning that with proper use it will never need to be sharpened. The rubber handle provides excellent grip in any conditions. These non-metallic blades will chip under torque, this is normal for the type of material. Do not drop your blade on hard surfaces while it's not in the sheath. Do not try to use this type of blade as a tool, screwdriver, or pry bar. Do not subject the sheathed knife to hard impacts or lateral torque. Disclaimer: This item is not a weapon and is not intended for use as a weapon. It is also not a toy and should be used responsibly. Proper care and caution must be exercised at all times with this object, as with any and all objects to avoid injury to oneself or others. The manufacturer and seller assume no liability for misuse or improper handling.