PUMA Pretec Spear Point. PUMA Folding Knives. These German-made folding knives use high grade stainless steel and scales (handles), along with high quality springs and locks. Mounting springs and locks is a special art for highly skilled craftsmen who assembles the parts and punches, then mills and hardens the spring and lock, and then finally grinds the pieces to fit a specific knife. Solid nickel and brass bolsters are designed to keep the fingers away from the blade edge. The beveled PUMA clip-point is designed to maximize strength while making it easier to get a superb edge. Blade Length: 3 1/7. Blade Steel/hardness: 440C/ 57-60 HRC. Blade Thickness: 3 mm. Closed Length: 4 2/3. Handle Material: Zinc Die-casting. Scales: Nickel ABS.