Tooltopia has a sale on the xzn sockets. I already bought them at a higher price. Hope it helps others.
http://www.tooltopia.com/vim-xzn100.aspx

 

Ordered a set.
Thanks for the heads up.

 

I'll add to the deal.

Orchard Supply Hardware has ALL of their GearWrench sets on sale for 50% off. I picked up a set of these:

http://www.osh.com/eng/product/gearw...ch_set/6657878

and a 7 piece set of flex head x-beam wrenches for $80 out the door.

James

 

What attachments use these?

 

Flywheel, door hinges, valve train, et al.

 

yeah, think I paid about half that just for two of these sockets in a pack, just to get the one to fit the door strap arrestor.

 

How do these differ from torx bit sockets?

 

well, they are called a 4x3 and have 12 points of contact. A Torx will not fit properly and will destroy the head and cause you to have to take some very unplesant steps to remove them. Don't ask how I know that...

 

Has anyone used the above-linked triple square bits on the cam hold downs? I was under the impression just from reading on here that the HAZET brand triple square bits, which are like $35 each, were the only ones of sufficient quality to use on the cam hold downs, to ensure they do not strip.

 

While the best quality tool is preferred by me, the real issue with the cam cover hold downs, as well as the hinge bolts, and a few other locations is both the quality of the steel (soft, mild steel, weak) as well as the depth of the socket on the bolt. Poor design and very easily stripped even with care and high quailty tools... not to mention some of these are "over torqued" and or rusty, in some locations....makes for real fun, I have found several ways to mess them up and have had to drill out a few.....I did just remove a flywheel yesterday with no trouble at all, but I used a 1/2" air impact and a good quality 4x3 tool

 

what size are the flywheel bolt tool?

 

The "hand impact drivers" work very well on this type of fastener, as well as on Phillips screws. (These are the ones that you hit with a hammer.)

 

12MM