ALUMINIUM SPIRAL UPCUT: This Professional Aluminium Spiral Up-Cut Router Cutter comes with a 1/4" shank, a 6.3mm Cut Diameter and a 20mm Cut Length. Ideal for milling lateral slots, it is designed for use with non-ferrous metals. TUNGSTEN CARBIDE TIPPED: 2.0mm micro-granular extra-hard tips for prolonged sharpness and cutter durability. Ideal for cutting softwood, hardwood, and man-made timber boards. PRECISION CUTTING: Highly ground tip face polished to 1200-grit for precise and accurate cuts, delivering an extra-fine "mirror" finish. VERSATILE SHANK LENGTH: Longer shanks cater to a variety of applications, compatible with handheld and table routers, providing flexibility and convenience. SAFETY ASSURANCE: Features a Safety K-Mark for optimal shank positioning, ensuring strong collet grip. EN Shank Markings for visible cutter safety data.