This is a great set. There's a flat strip around the sides of the ball-ends that provides additional surface area to transfer a lot of force, without damaging the inside of the hex fastener. The groove between the ball-end and shaft is shallow, so the balls don't break off. The trade-off is a bit less wobble angle, but I'll take that over fastener damage and snapped-off ball-ends (which I've experienced using another brand). The fit in fasteners is accurate, with almost zero play. The set also includes wobble extensions which provide additional offset angle when needed, like for the shifter linkage on my Harley. Downsides? The chrome isn't show quality, and the two longer 1/4" drive extension bars aren't wobble types. This set is an absolutely fantastic value for the price.

One star for QC. Look like someone used and return it. The tool are dirty. They just ship it to the next customer.