When sourcing hand tools, the material composition determines durability and safety. Look for Chrome Vanadium Steel (Cr-V) for wrenches and pliers, as it offers high strength and corrosion resistance. For high-impact tools like hammers or chisels, S2 Tool Steel or Drop-Forged Carbon Steel is preferred. Ensure the tools meet DIN (German Institute for Standardization) or ANSI (American National Standards Institute) hardness benchmarks, typically ranging between HRC 40-55 depending on the tool type.