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depends on what you are doing - technically you are supposed to spin bolts/nuts using the flats - 6 points grab the flats not the points and let you apply lots more torque. 12 pointers grab the points more than the flats, so you are more likely to 'round one off'.
That being said, if you are working in a really tight area and can't get more than a fraction of a turn each time with the wrench the 12 pointers are nice because they will let you find the groove easier.
basically, if I could only afford one nice set I'm going for the 6ers... but an additional set of 12 pointers would be handy if I had enough space and money to double up on everything...
I have seen open end wrenches where the bottom was made with a V shape instead of a U, so it would grip the flats more securely, but I can't remember who made them. (Old age, I guess.)
I've never seen a 12 point open end wrench. Is this a snap on specialty tool? I have seen open end with 12 point box on the other end. JK. I knew what you meant.
I prefer the 12 point sockets. I have never rounded a bolt head off with one either. Same for the box end on a wrench. That 12 point box end wrench will really save you when you get bolt that is somewhere tight. I think that 12 point sockets have a thinner wall too, which is nice to have.
If you work on bigger trucks (tractors) you will find a lot of 12 point stuff, especially on the bigger starter bolts. Other than that, I think you are better served with 6 point wrenches and sockets and stand less of a chance of rounding something off.
You really need both 6 and 12. On sockets if I had to choose it would be 6. When you pull on a rachet or breaker bar the force is on an imaginary plane somewhere way above the fastener depending on the lenbth of the sock and extension and thus more likely to slip off and round off the head. With a wrench you are pulling on the sme plane as the head and slippage is minimized. I use 6 point for teardown. And replace the sockets when they start to get a little sloppy, save some skin.
I have all my sockets in both except wobblies and they are mostly 6 point.
My Mac wrenches have the V throat, they are my favorites.
Last edited by willowbilly3; Jul 20, 2003 at 05:39 AM.
If you can afford it buy both 6 & 12 point.
I am in the process of tearing down a 48 F1, without the 6 point it would be all heat wrench, with the 6 point I can get a good grip and snap the bolts instead of fighting them all the way off.
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