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Robertson Drive Bit: #2, 4 inches

Robertson Drive Bit: #2, 4 inches

4 reviews

Regular price $0.00 USD $3.49 USD Sale

99 left in stock.
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Customer Reviews

Although the terms "square drive" and "Robertson drive" are often treated as the same, there is a big difference - Robertson drives and Robertson screws have a slight taper to the square recess and a square drive and screw does not.

Robertson drives were invented by Canadian Peter Robertson around 1906 and are very popular and common in Canada, but not so much elsewhere.   

The advantage of using a Robertson drive with a Robertson screw is that the screw will "cling" to the driver, allowing one handed driving and virtually eliminating slippage common with drives such as Phillips drives.

These #2 Robertson drive bits fit our Rob Cosman screws with their duo Quadrex heads perfectly.  While a #2 square drive will also work, it doesn't fit the screw head perfectly like a Robertson and will not give you the "cling" feature.

We highly recommend you use Robertson Drives with our Rob Cosman screws.


    Customer Reviews

    Based on 4 reviews Write a review
    Customer Reviews
    4.8 Based on 4 Reviews
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    Filter Reviews:
    Sam D.
    United States United States
    ROBERTSON drive

    The drive bit and screws worked great . Use the #6 screws in the oak runners on my sled no problems.

    David S.
    United States United States
    Robertson Drive Bits

    Excellent product. Bought all 4 sizes. Well made. Work well.

    Stan H.
    United States United States
    As advertised.

    I’ll just say that I’m mad at Henry Ford for depriving the US of access to this great system for so long. No learning curve, and one handed use is a Godsend.

    gregor r.
    United States United States
    Cosman screws

    Works great on softwoods and would be better if the small spurs that cut wood to counter sink were more aggressive for harder wood. Love Robertson square drive feature. Shipping took 2 weeks ;-( & shipping costs in Canada are easily 1/3rd higher than U.S. shipping costs. Boooooo on Canadian shipping system. But, from Rob again? Yes!