Pre-piercing holes in thin sheet metal, wood, plastic, leather, etc., precision ground square tip, high hardness, extremely durable, chrome-plated, durable rust protection, pentagonal handle with spherical surface, for painless application of large pressure forces, high-quality materialization, impact resistant, oil and gasoline resistant, special alloy based on spring steel, exceptional elasticity with high hardness, laser inscribed with serial number, lifetime warranty.