Its entirely made out of 6061 aluminum except for the hardware one 6-32 thumbscrew and a steel thread insert in the aluminum body. (aluminum doesn't wear as strongly as steel) I can safely say you could throw the thing down some concreate stairs and not have a problem other than all the scratches it would pick up. Its especially designed to protect the tips of the picks it might even stand being run over by a car although I'm not anxoius to take that test.
next to a quarter for scale

different angle

The set includes two tension wrenches large and small one "jimmy tool" I made for brainless emergency entry, one hook, one diamond, one large half diamond, one small half diamond and one rake.

the depth was specifically made to hold at least 3 more picks if I should decide I need to add more picks for any specific purpose but the set is so supposed to be everything I use, when I pick and nothing extra.
Shrub: Ive sorted your links out,