For sale: A professional set of Allen Keys / Hex Keys from the famous American brand Proto, well-known for its high durability and efficiency. Set Features: - Manufacturing: Original American (USA), designed for heavy-duty and tough use. - Condition: Very excellent with minimal use. - Sizes: Available and complete (mm). - Variety: Includes Ball-End keys for working in tight angles, standard L-shaped keys, as well as original bases and holders for organizing the sizes.