On Thu, 06 Feb 2020 19:01:14 -0000, Ed Pawlowski wrote:

On 2/6/2020 1:36 PM, Thomas wrote:
98mm is under 4 inches. What do you consider short?

Depends on size, thinner are shorter. You can find a few 18" ones here
https://www.mcmaster.com/extra-long-drill-bits

I've found plenty really long masonry bits that are 10mm thick or more, but thinner ones, like you'd use for pilot holes for screws, are always way too short.