Made from knife grade stainless steel, it is razor sharp out of the package. Aircraft ferrule is made of quality aluminum and offers a perfect flight effect because it is tested for perfect alignment. The patented diamond tip can take on the toughest of hide and bone splitting penetration. Grade Stainless Steel Knife with aluminum ferrule. Main blade is replaceable or can be sharpened. Diamond tips cuts on contact. 7/8" Cutting Diameter. .040" Blade Thickness.