This set was $9.88 on Black Friday, now down to $6.88. It's available I'm both metric and SAE versions.
The metric set includes the ratchet and sockets from 10-18mm. Lose the 11 or 18, and replace with an 8mm bought separately, and you'll have a usable set to tuck in the car or under the seat of the motorcycle. Sockets are 6 point, which is my preference for anything under 17mm.
The ratchet isn't all that great (unlike the regular Husky ratchets), but the sockets alone are worth this. All are lifetime warranted, and the sockets are standard Husky. The little storage case is a nice plus.