5/16"x6" Cobalt Aircraft Extension Drill 2141220 Shell Gadus S3 V460 is

Shell Gadus S3 V460 is Listed by Several Leading OEMs:

Valve rocker cover

it will not fit engines before 1964

Mack EO-M Plus

Eliminates grinding wheel heat build-up and extends wheel life

5/16"x6" Cobalt Aircraft Extension Drill 2141220 Shell Gadus S3 V460 isNational Aerospace Standard 907, Type J Cobalt Drills, 6" OAL with Jobber Drill Flute Length, Cobalt Extension Drill, Cobalt HSS, Surface Treated, 135 Split Point These cobalt jobbers length drills are used for drilling in tough, high tensile strength materials like stainless steels, titanium and inconel. They are made of cobalt high speed steel, with heavy duty flute construction and 135 split point.