On Thu, 06 Feb 2020 20:39:07 -0000, Rod Speed wrote:

Commander Kinsey wrote
Thomas wrote

98mm is under 4 inches. What do you consider short?

The standard length for a 4mm width drill bit tends to be about 60mm.

Useless for almost every task.

Never found one that long useless for what I was doing
and I drilled a hell of a lot when building the house myself.
mostly for bolting the oregon facia boards onto the steel
vertical angle iron that I had welded to the steel roof beams.
Bolted on with gutter bolts.

I'll give you an example, I'm trying to drill through a conservatory framework (which is 60mm thick) to put a bolt through it to go into the wall. I need 60mm for the cobalt drill to make the hole, plus some extra length as the drill chuck can't get right up against the framework (due to the window framing). And even longer when I want to get into the wall with the masonry bit, having gone through the frame.