General description The Faithfull Hexagonal Key Set includes three folding sets that cover the most commonly used metric, imperial, and TORX (star) sizes. These professional-quality tools are made from fully hardened chrome vanadium steel for durability and come in a non-slip, soft grip coated case for easy storage and transport. Each set is clearly marked with the key sizes for quick identification. Technical specifications Number of pieces: 25 Metric hex keys: sizes 1.5, 2, 2.5, 3, 4, 5, 6, 8 mm Imperial hex keys: sizes 5/64, 3/32, 7/64, 1/8, 9/64, 5/32, 3/16, 7/32, 1/4 inch TORX keys: sizes T9, T10, T15, T20, T25, T27, T30, T40 Compatibility and accessories Compatible with most fasteners requiring metric, imperial, or TORX keys Supplied with a fold-out case for organization and portability Installation No installation required; simply select the appropriate size key for your fastener Usage Use the hex keys to tighten or loosen screws and bolts in various DIY, home improvement, and