Oil feed or Oil fed Drill Coolbor brand are unique with Straight Shank Spiral flutes with Internal Coolant Channels for carrying coolant directly to the cutting edge. Have longer tool life than any other drill. For drilling tough material with 135 degree split/notched point style. British made in excellent 1st quality to DIN340 - Click on : 

 Oilfeed Drills Metric  from 3mm to 25mm

 Oilfeed MTS Drills Metric  from 8mm to 50mm

 Oilfeed MTS Long Drill Metric  from 8mm to 20mm

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