I own craftsman, sk and Mac. I'd rate them mac, craftsman, sk. The mac are strong and the bits stay in the sockets but the socket is uniform from top to bottom so if the bolt is close to something it may contact at an angle. The craftsman ones taper towards the tip and also haven't come out, but I have twisted them. The sk has the broadest size for the set, but the smaller ones are press fit into the tapered socket and I've pulled many out and head to epoxy them in. After that they didn't move. The larger ones are pined, I wish they all were, that set would be perfect. Hope this helps if you consider other brands.