As with the black detailing on Spirit's Foam Hammer, the level of blood splatter and smudging varies WIDELY on these, and I consequently suggest even more strongly that you examine them in-store. The handle on this one has the least amount of coverage of any I've seen over the years.
It undeniably feels hollow, but as long as you aren't beating things or people with it, it'll do the job. The wood-grain detailing of the handle is pretty swish and the head certainly looks the part. It bears a molded Rubie's Costume Company logo, but I've seen this sold in both Spirit and Party City. A cursory examination of available information reveals that it was subsumed into a larger corporate ecosphere. Yep, that'd explain it.
Yes, I wanted to sound like Perceptor. Wheeljack sucks~