Robertson Drive Bits - Lee Valley Tools

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These genuine Robertson screw drive bits are manufactured with accurate tool-steel square-recess drive tips for a precise fit, and durable powder-coat carbon-steel shanks. The shock-resistant steel tip insert seats firmly in the drive and will not cam out.

Each bit is identified by a powder-coated color particular to the Robertson drive size – a standard reference. All have 1/4" hex shanks.


  • The yellow #0 drive bit is 1” long and is for screw sizes #3 and #4.
  • The green #1 drive bits are 1”, 2” or 4” long and fit screw sizes #5, #6 and #7.
  • The red #2 drive bits are 1”, 2”, 4” or 6” long and fit screw sizes #8, #9 and #10.
  • The black #3 driver bits are 1”, 2”, 4” or 6” long and fit screw sizes #12 and #14.


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