Wera - 5022720001 Stainless 3950 PKL/9 Ball-point Metric Hex-Plus Ergonomic L-Key Set with Two-Component Storage Clip, 9-Piece

I picked up a set of Wera hex keys a while ago after stripping the truss rod nut on a cheap DIY kit's neck. They have a slight taper to the non-ball end, so it gets a little bigger the deeper in the nut it goes. Haven't stripped a bolt/nut yet since I started using them. Looks like StewMac has a similar here.