Straight flutes and specialist cutting geometries mean that ULTRA Straight-Flute cutters offer superior performance in hard materials like Hardox, Armour plate and Stainless Steel. Their ULTRA coating helps reduce friction and increase life span when tackling the most challenging broaching jobs and individually brazed Tungsten Carbide teeth give a clean, accurate cut that outperfoms the closest comparable products.Suitable for use with Cembre, Rotabroach and other similar rail track drilling machines as well as all standard 19.05mm magnet drills.55mm depth of cut 19.05mm (3/4") weldon shank