5/16 in. HSS Oxide Finish 135 Deg. Split Point Heavy Duty Jobber Drill

R10B jobber drills are available in fractional sizes from 1/16 inch to 1/2 inch and are very versatile, being suitable for both hand held and machine applications. They have a steam oxide finish which ensures clean, accurate holes by preventing workpiece material from sticking to the cutting surfaces of the drill, and are manufactured from premium High Speed steel for use in a wide range of materials including aluminum, stainless steel and steel. R10B jobber drills have a split point to reduce the push force needed and as an aid to self-centering, producing more rounded holes.


  • Item Code: 010220
  • Brand: Precision Twist Drill
  • Availability:
  • Mfg Part #: 010220

Unit Size: 1

Features Tech Specs

Features Back To Top

Tech Specs Back To Top

Brand Precision Twist Drill
Coating/Finish Steam Tempered
Cutting Direction Right
Decimal Size 0.3125"
Flute Length 3-3/16"
Fractional Size 5/16"
Material High Speed Steel
Metric Size 7.94 mm
Overall Length 4-1/2"
Overall Length Inches 4.5"
Overall Length Metric 114.3 mm
Point Angle 135 Deg.
Series R10B
Shank Style Cylindrical shank
Type Jobber Drill

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