What type of bit/drive do you prefer and tell us why?
Robertson screwdrivers also called a square drive screwdriver are easy to use one-handed, since the tapered socket retains the screw, even if it is shaken. They also allow for the use of angled screw drivers and trim head screws. The socket-headed Robertson screws are self-centering, reduce cam-out, stop a power tool when set, and can be removed even if painted-over or old and rusty. In industry, they speed up production and reduce product damage"
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"The Robertson socket head screw soared in popularity. Craftsmen favoured it because it was self-centring and could be driven with one hand. Industry came to rely on it for the way it reduced product damage and sped up production. The Fisher Body Company, which made wooden bodies in Canada for Ford cars, used four to six gross of Robertson screws in the bodywork of the Model T and eventually Robertson produced socket screws for the metal bodied Model A"
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"In a recent ranking of great Canadian inventions, the Robertson ranked seventh, ahead of the zipper and the retractable beer-carton handle, just one spot behind the pacemaker. But the Robertson is the real lifesaver, rescuing us from both flatheads and Phillips vastly inferior products. That sham artist actually had the nerve to suggest that his screwdrivers were designed to slip, to prevent over-tightening.
The Robertson never slips, and it never strips, and it can be driven one-handed with no stripping"
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Woodweb: A discussion of screw characteristics and preferences
