Bordo Metric - Black HSS Jobber Drill Set in ABS Plastic Case With Bonus Step Drill

• Bordo Metric 25 Piece Black Knight M2-HSS Twist Drill Set in ABS Plastic Case
• 1.0-13.0mm x 0.5mm rises
• DIN338
• BONUS: HSS Step Drill 4-12mm

All About 118° Split Point (crankshaft point)

• The split point is self-centering and reduces the need for end thrust.
• Friction at the workpiece is reduced. 118° point angles are ideal for use in materials such as mild steel and cast iron.
• The 118° point creates easily controlled chips that are wide and thin.

All About Drill Bit Surface Treatment

• Black Finish Jobber Drills (also called blue finish) achieve their distinctive colour by steam tempering a thermal process resulting in a porous tool coating.
• This surface helps to keep lubricant on the tool particularly important on the cutting edges thus reducing friction and cold welding.
• The result is increased tool life. Black finish tools are generally recommended for ferrous applications where the oxide layer aids chip flow and heat dissipation.

Contents