metal, this adjusted lever set ensures durability and longevity, perfectly suitable for 8504 / models This metal set resists deformation under pressure, ideal for both professional barbers and home users for a smooth touches and anti slip grip to fit personally styles or device aesthetics Features an ergonomic design, allowing and accurate trimming for various hairstyles Perfect for salons, barbershops, and personally grooming, upgrading your ' s control and comfort for effortless styling