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What Is a 12-Point Socket?
As you might surmise from the name, it’s got 12 points spaced at 30 degrees for a double hexagonal shape. There are 12-point fasteners out there, though they’re typically found in more specialized industries and for lighter clamp loads where the head of the fastener is recessed or not meant to be showing.
The wall of a 12-point socket is thinner and when used with a six-point fastener it makes less contact and offers less torque.
Which Socket Should You Use?
For the most part, you’ll really only need to use your six-point socket. Unless, of course, you have a 12-point fastener, then you should definitely use the 12-point socket.
If you’re doing any heavy wrenching, go with the six-point socket. It’s much less likely to slip off a stubborn fastener or round over the corners because it maximizes contact with the surface area. A six-point socket can also withstand higher torque.
The 12-point socket comes in handy for those hard-to-reach fasteners, or the ones you can’t see all that well, because the double hex configuration makes it easier to slip over a fastener without it having to line up perfectly as it does with the six-pointer. They’re fine for lighter duty repairs too, but a 12-point socket is more likely to slip, which is why the six-point version is better on stubborn bolts.
Chrome-Plated Sockets
One last point. Most high-quality sockets are chrome plated to prevent rusting and make cleanup easy. However, after years of use, the chrome finish can flake off. Don’t use a socket if the chrome is peeling. The chrome will be sharp as a razor blade.
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