I was surfing the web last night for swivel impact sockets and I ran across this set by a company called Omega Pro. I'm 95% sure these are the same sockets I've seen on the Mac truck by their economy brand Expert. I have pictures of the two below and you'll see they look identical.
The only truck I have coming to my work is Mac Tools and am very satisfied. Love the no questions asked warranty even on drill bits, which is unheard of to my knowledge. What I like about Mac is that since quite a large majority of their tools are rebranded, if there is a tool I'm not worried...
The new Mac Soft-Grip Screwdriver set is expensive, but without a doubt is worth the money. The handle feels awesome in the hand and is machined really well. No problems whatsoever.