Tanoi Metric Long Reach Tap Oxide Spiral Point HSS-E V3 for most materials M18x2.5Designed for professional machinists and serious DIYers, the Tanoi Metric Long Reach Tap delivers reliable, precise threading across a wide range of materials. Its long reach geometry and spiral point design are built to handle deep holes with clean, accurate threads and confident cutting action. Thread size and pitch: Metric M18 x 2. 5 for standard, widely used thread engagements Material grade: HSS E V3 (high speed steel with enhanced toughness) for