Durable high speed steel metric thread cutting tool set designed for reliable threading in automotive and machinery work. Versatile applications - Suitable for repairing engines and construction machinery - Also useful for bicycle repair, furniture assembly, and machine manufacturing Key materials and construction - High speed steel for durable metric thread cutting - Handle made of bearing steel - Chuck made of alloy steel Design and performance - T type wrench set provides stable leverage and precise control for cutting threads in tight spaces - Built to withstand frequent use in professional settings Practical use scenarios - On-site engine maintenance and repair on cars and heavy equipment - Re-threading bicycle components or assembling bicycle parts - Precision threading tasks in furniture assembly and small to mid-scale machine manufacturing This tool set offers durability, consistency, and versatility for a range of automotive and machinery threading needs.