• Made of high-quality 304 stainless steel, rust-resistant and durable. • The set includes 40 pieces in four sizes: 20 mm, 25 mm, 30 mm, and 35 mm (10 units of each size). • Flat and sturdy design that securely holds keys, preventing them from slipping. • Smooth surface with silver shine, easy to assemble and skin-friendly. • Versatile for organizing keys or carrying out DIY projects, crafts, models, and ornaments.