The Ka-Bar Orginal TDI Serrated Edge Knife is worn on the pant belt, providing a well-concealed "last option" for self-defense situations. It is designed by John Benner, founder of Tactical Defense Institute. It features a fully serrated blade, making it ideal for cutting looped and synthetic materials. The knife has a hard plastic sheath and a reversible black metal belt clip (1480CLIP). It fits a maximum belt height of 1.75", width of 1.25", and thickness of 0.25".