I have to disagree - I bought a set of Bondhus ball drivers for my workshop and a set of Dubro for my trailer. They USED to be different, but the newer Dubro look and feel like the Bondhus - and the handles seem to twist loose on the Bondhus easier. I've had two do that, and I'm the only one who touches them. The Dubros on the trailer get loaned out and probably have at least twice the usage, no problems whatsoever. I'll be replacing the workshop set with Dubro!

I have one set of ball drivers and one set of straight (non ball) hex drivers. The balls are not good for high torque. They can break off at the necked-down area, and then good luck getting the broken ball out of the socket. Also, ball drivers will not work well in Nylon screws. Bondhaus makes a set of L wrenches with balls on one end and straights on the other.

I've had Du-bro, Bondhus, and DuraTrax. I much prefer the DuraTrax because the handle doesn't shrink as you go down in driver size. The Precision set as illustrated here http://www.duratrax.com/caraccys/dtxr0380.html shows the handle style I prefer although I never bought a "set" since my LHS sells them individually. I keep the good one's at home on my build table and use the Dubro & Bondus in my flight box. But I do like the way the bondus keeps the screws attached and feel the temper on the tips is more durable.

Lastly, while I much prefer the ball-head sometimes it will slip if the angle is too much or the screw low quality and only a genuine allen head shoved in deep and firm will maintain its purchase.

Regards,

Clay

I bought a couple of the cheap folding sets of hex drivers; one English, one metric. I use them for things like breaking screws loose, etc. and have found them to be very useful. For one thing, I am not well organized and I often find the folding drivers before I find the right size ball driver.