Based on my own experience, the BASIC TOOL BOX should include:

A plastic or metal box such as the 13² plastic box from Walmart or the 14²
plastic box from Lowes. The box should have a secure latch that won¹t
come open when picked up.

#1 Philips screwdriver

#2 Philips screwdriver

1/8² Flat blade screwdriver

1/4² Flat blade screwdriver
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What about Posidrive screwdrivers ? These are similar to Philips type of
screwdrivers but have additional 'notches' (if that is the correct word)
for better grip . The relevant screw heads are accordingly.

Frank , GM0CSZ / KN6WH

PS Most screws used in the UK are now of the Posidrive type.