The Hertel Extension Tap is a precision threading tool engineered for professional machining applications. This M12 x 1.75 metric tap features 3 flutes with a spiral point design that efficiently pushes chips forward, making it ideal for through-hole threading operations. Crafted from high-quality High Speed Steel, this tap delivers exceptional durability and cutting performance in various materials. The 6-inch overall length provides extended reach for accessing deep holes where standard taps cannot reach, while maintaining threading accuracy. With its plug chamfer and 6H class of fit, this tap ensures precise thread tolerances that meet international standards for metric fasteners. The D6 design optimizes chip evacuation during operation, reducing the risk of tap breakage. Perfect for maintenance shops, manufacturing facilities, and precision machining operations requiring reliable metric threading tools in hard-to-reach areas.