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

it delivers precise corner radii and consistent results across demanding materials

this end mill delivers smooth cutting action

and hobbyists who need reliable hole finishing in a wide range of materials

reducing runout and improving finishing accuracy

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