Cobalt Drill Bit 5/16" Jobber Length

Cobalt Drill Bit - 5/16" Jobber Length.  Also known as standard length drills, jobber drills are the most popular and widely used lengths that can be used in portable and machine drilling.  The 5/16" drill bit is 4-1/2" in length.

These cobalt drill bits have a 135° split point making them ideal for drilling through tough materials by hand. The 135° tip angle and the split point virtually eliminates drill “walking” when beginning a drilled hole.

Sizes available include:

• 1/8" (#COB125)
• 5/32" (#COB156)
• 3/16" (#COB187)
• 1/4" (#COB250)
• 5/16" (#COB312)
• 3/8" (#COB375)