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

Ah, the phrase "extra long" seems find them. Sometimes search engines are so pernickety.