Faceplate for lathe - rotary table milling machine

[Toolmaker51]

As a complete newbie to virtually all things steel, what is the name of the tool used in the middle picture, 4th row? It appears to be a combination drill bit and thread tapping tool. I usually do these two operations as separate activities, but ....... Who knows what I might learn!

Mike

Same as preceding picture, a HSS [high speed steel], 3 flute, spiral tap. I'm guessing 10 or 12mm. Providing my browser displays same rows and spacing as yours...There is a tool known as a "Drap" which combines the operations, but IMHO they aren't very suitable to common machinery, to run drill proper speed and feed, and then the tap. Also limited to capacity in thread depth or material thickness. Same company makes a "Dreamer" combining Drill+Reamer, with same restrictions on best use.
Web search indicates a different opinion; hex drive [ie cordless] at least as small as 6-32! I've been wrong before.
I do not like driving conventional taps in three jaw chucks. Every chuck I own runs like the day I bought them, in stationary or rotating spindles. With some close to 40 years old, they've achieved a good return on investment.
Every place I've worked where that was a common practice, never had chucks without scored jaws. Result of slipping taps, often vicinity of the drive square, and much harder than drill shanks. Then again, many operators haven't been instructed how to operate drill chucks.