These blades are on average are seven to ten times sharper than other X-ACTO blades. The coating on the blades adds significant strength to the blade itself, particularly the tip; the coating is applied after the blades are atomically sharpened. The blades are ideal for cutting medium to heavyweight materials such as wood, paper, plastic metal, film and acetate. Details:#11 fine point blades100 countZirconium nitride-coated bladesDurableHigh quality