OSG 55° Helix Endmill Square Edge - Centre Cutting Long Length - 4mm Blacksmith Drill The cobalt-infused HSS composition delivers

The cobalt-infused HSS composition delivers improved wear resistance and heat tolerance

delivering controlled reaming performance with a clean bore finish

Laydown triangular geometry for rigidity: The triangular laydown design provides strong edge support

and maintain smooth cutting action

delivering dependable performance through tough materials and repeated use

OSG 55° Helix Endmill Square Edge - Centre Cutting Long Length - 4mm Blacksmith Drill The cobalt-infused HSS composition deliversThe OSG 55 Helix Endmill Square Edge Centre Cutting, Long Length, 4 mm diameter is a compact milling tool built for engineers, shop teams, and DIY machinists who need reliable reach in tight features. It excels at milling, profiling, and slotting, delivering precise, repeatable results in a wide range of materials and setups. With a 55 degree helix, this endmill promotes efficient chip evacuation and reduces cutting forces, helping keep heat in check