OSG 55° Helix Endmill Square Edge - Centre Cutting Long Length - 4mm Blacksmith Drill delivering controlled reaming performance with

delivering controlled reaming performance with a clean bore finish

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

while the precise R0

The 60° center angle ensures accurate centering and stable entry

easy gauging

OSG 55° Helix Endmill Square Edge - Centre Cutting Long Length - 4mm Blacksmith Drill delivering controlled reaming performance withThe 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