High-concerned chemical: None - This set of mini diamondneedle files is completely free of harmful chemicals, making it safe for use in various environments, including educational settings and professional workshops. Model Number: Files - As part of the Files series, this set is engineered for superior performance in grinding, polishing, and engraving tasks, making it a versatile tool for craftsmen and hobbyists alike. File Cut Type: Single-cut - Designed with a single-cut style, these files offer a smooth, fine finish, ideal for detailed work on metal, glass, and stone. The single-cut teeth provide precise control over material removal and finish. Material: - Constructed from high-quality material, these files deliver exceptional durability and . The grit is uniformly distributed to consistent performance across all types of hard materials. : Woodworking - Although primarily designed for metal, glass, and stone, these files are also incredibly effective for woodworking projects, allowing for fine detailing and smooth finishes on wooden surfaces., Weight: 0.19069985663 pounds, Manufacturer: NONDK