Meet the Wiseman Threading Tools Bottom Lead Metric HSS Tap Left Hand - M10x1, a precision hand-tap engineered for clean, accurate internal threads in metric sizes. Built to perform in everyday machining and repair work, this tap delivers dependable results where reverse threading is required.

What makes it stand out

• Left-hand threading: specifically designed to cut left-hand threads, enabling reliable operation in components that tighten or loosen in the opposite direction of standard right-hand taps.
• Bottom lead design: optimized for starting into holes and finishing with consistent depth, ideal for through-holes and blind holes alike where controlled chip formation matters.
• HSS ground, uncoated: high-speed steel provides a sharp, durable cutting edge for general-purpose threading without coatings that can wear off under routine use.
• ISO 529 dimensions: manufactured to standardized tolerances, ensuring compatibility with common drill sizes and mating parts across mechanical assemblies.
• Size and pitch: M10 x 1 — 10 mm nominal diameter with a 1.0 mm thread pitch, a common specification for precise, medium-length engagements in mechanical systems.
• Reliable for hand tapping: designed for use with a tap wrench or T-handle, offering predictable guidance and smooth operation during threading jobs.

Whether you’re repairing a left-hand threaded component in automotive work, fabricating a custom fixture, or refining a mechanical assembly, this Wiseman left-hand tap delivers dependable performance. Use with a suitable cutting fluid, maintain a steady, perpendicular approach to the workpiece, and back off to break chips as needed to maintain clean, accurate threads. With its robust HSS ground geometry and ISO-compliant sizing, it’s a practical addition to any machinist’s toolkit.