It was a lot smaller than I expected. I think I should have read the description. The hammer head appears to fit over a machined handle. I was a bit skeptical, but so far so good. When the head comes off there seems to be enough room to add wood glue. I used them to attach wheels to a chair for my home office. The hammer is stronger than I expected. I'm excited to see how he handles my next PVC project. I'll update later (when Revain allows it).