Solid submicron grain carbide drill For fast drilling in aircraft alloys, cast aluminum and high silicon content materials Strong core geometry with double margins for chip breakage and clearance
4mm (.1575) 4mm DOUBLE-MARGIN STR/RHC DR Solid submicron grain carbide drill For fast drilling in aircraft alloys, cast aluminum and high silicon content materials Strong core geometry with double margins for chip breakage and clearance G style flutes Live tooling recommended on lathe processes