I saw on YouTube the collar of lawyer Egorov, I decided to repeat it. I just did not bother with polishing, inserting wood into the handle, observing the dimensions. The main thing is that this device it worked. It took forty minutes to make. Caption: "PAPE from the SON" do not bother you. I made this device as a gift to my father. The photo shows how the wooden handle of the hammer cracked and I actually saved it from further cracking. I recommend for repetition! You can see the process of knitting the clamps on the YouTube channel of the lawyer Egorov. And for comfortable work with my version of the clamp, you need a ratchet key for 14 or 17, a small hammer and nippers.
And here is the result of work of the clamp in my previous homemade:
