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.