What are the 3 main drive sizes?
Most Common Drive Sizes
1/2″ Drives: Such drives are mostly used for heavy jobs where the nuts are massive and need more force or torque. ½” drives are mostly used in 19mm socket sizes. ...
3/8″ Drives: Such drives are more versatile. ...
1/4″ Drives: When it comes to low torque jobs, you can go for 1/4″ drives.

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Note added at 12 hrs (2023-03-23 22:09:38 GMT)
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Different socket drive sizes

There are 5 different sizes of 'drive socket' that are commonly used: 1/4″, 3/8″, 1/2″, 3/4″ and 1″.

- https://www.wonkeedonkeetools.co.uk/sockets-and-socket-sets/...

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Sockets and socket sets are available in different drive sizes, giving flexibility over a range of torque and socket, hex socket sizes.

- https://www.secure-tools.com/category/1343/sockets-and-socke...

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Multi-size socket adapter sets come with an assortment of socket adapters with different drive sizes for drive tools.

- https://www.grainger.com/category/tools/sockets-bits/socket-...