On Mon, 23 Dec 2019 08:21:21 -0800 (PST), fred
wrote:

Can anyone recommend, by name, a good quality set of these bits. I've got two different lots, one from Amazon and one from Fleabay and they are both dire. Ebay ones are anything but self centreing and the Amazon one had short bits in some of them which could not be adjusted satisfactorily

Not sure in what respect you mean. Once a drill bit is sharpened it's
never quite the same again. The most noticable thing is the holes you
drill are slightly larger than when the bit is new (assuming it's been
made to a decent standard in the first place!)
Are you saying the apex point of the drill is not central wrt the
shank? Or that it is central but the chuck can't centre it up as it
should for whatever reason?

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