Buy a set with assorted sizes. You'll need more than just that one size. Here's a couple options.
Clutch head set for ratchet handle
Clutch head screwdriver set
I also have a set that fits in a 1/4" impact driver for those really stubborn ones. Light impact can help get the rusted ones out.
52Carl built a tool that uses an air hammer and a lever to loosen the stubborn ones.

Kevin
1951 Chevy 3100 work truck
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1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car)
Busting rust since the mid-60's
If you're smart enough to take it apart, you darn well better be smart enough to put it back together.