#4COJO Jobber Drill, M-42 Cobalt, 135 Degree Split Point, Size: #4, NAS907 Type J Features:

• This Jobber drill is made from cobalt.
• This Jobber drill is manufactured to Aerospace Standard 907
• Jobber length drills, commonly referred to as simply ‘Jobber Drills’, are the workhorse of the aviation industry.
• The spiral flutes of a Jobber drill are constructed with a higher flute angle to remove chips more easily.
• Quality is the key to producing satisfactory holes, and will determine production rates and tool durability.