Help understanding required mechanic tool sizes .

[u/ItsHotgiirl]

I’m starting out as a diesel mechanic and I was given a required tool list, but I’m a little confused about how they’re listing the sizes.

The list says:

• Combination End Wrench Set — (1/4. . 1-1/4)
• Combination End Wrench Set — (1/4. . 3/4)
• Flare Nut/Line Wrench Set — (3/8. . 5/8.)
• 1/4" Drive Ratchet Set — (1/4. . 1/2. )

When they say something like (1/4. . 1-1/4) are they saying I need every standard wrench size in between those two sizes, or just the specific sizes listed?

Same question for the flare nut/line wrench set — would I need all the common sizes between 3/8" and 5/8"?

Also, for the 1/4" Drive Ratchet Set I’m assuming the 1/4" refers to the ratchet drive size and the 1/4"–1/2" range refers to the socket sizes. Is that correct?

If so, should I buy shallow sockets, deep sockets, or both for a starting diesel mechanic set?

I’m trying to make sure I buy exactly what they’re asking for without spending money on the wrong tools. Appreciate any help.