This Round Ended Key Stock Assortment comes with a plastic storage box for easy carrying and organization. The feather keys can be sorted neatly and accessed conveniently. This set features precise craftsmanship with smooth edges and no burrs, ensuring safe handling during use. The key stock is widely used in everyday applications, primarily for securing equipment that requires frequent disassembly. It fits into a matching keyway to transmit torque between shafts and hubs or bushings. This set includes multiple sizes: 3mm, 4mm, 5mm, 6mm, 8mm, 10mm, 12mm, 16mm, 20mm, 25mm, and 30mm, meeting various needs. Made from stainless steel, the keys are rust-resistant, wear-resistant, and durable. Color: Black Material: Stainless Steel Sizes Included: 3mm, 4mm, 5mm, 6mm, 8mm, 10mm, 12mm, 16mm, 20mm, 25mm, 30mm Package Contents: 1 x Plastic Box of Round Ended Feather Keys (140 pieces total) Note: Lighting and display settings may cause slight color variations between the image and the actual item. Measurement may vary by +/- 1-3 cm.