Revolutionary ceramic utility blades fits most standard utility knife handles for a long-lasting, harder, sharper and safer tool. Safer than traditional metal utility knife blades, non-conductive, non-magnetic, chemically inert Zirconium Oxide never rusts and is the most durable material in the world, next to diamonds. Up to 10x sharper than steel, a single blade is equivalent to ~20 metal blades. Oil-free finish is ideal for clean rooms. Fewer blade changes needed means fewer injuries, and lower costs – save money and your fingers!  63 x 19 x 0.8 mm. 2 double-sided blades per pack