- High-speed steel (HSS) round rods, 1.7mm diameter and 100mm length, pack of 5 units - Hardness HRC61~63 and polished finish, combining strength and durability for demanding tasks - Versatile use: suitable for lathes, milling, cutting, shaft manufacturing, gears, gravers, and needles - Compatible with copper, aluminum, and non-hardened steel, ideal for industrial and mechanical applications - Easy to cut and shape, allowing you to create custom replacement parts as needed - Smooth and resistant surface, crack-free, easy to work with and handle - It is recommended to apply oil and avoid exposure to air to protect against rust and extend service life