The blades are made of ice tempered, stainless steel to maintain lasting sharpness. The exclusive "No-Nip" Tip is designed to eliminate accidental nipping. Blades can last as long as 6-8 months on average but is dependent on the number of cuts and the condition of the hair. It is the most environmentally sound blade and shear system in the world, less material used and less energy to produce. Blades are removed and replaced safely with an innovative dispenser that saves you time and money.