In this patent recreation, I work on a type of alligator wrench designed to work with tapered fasteners. Do I know of any tapered fasteners? No. Does that mean the person who originally designed this wrench in 1911 as insane? Possibly.

You can view the original patent here: https://patents.google.com/patent/US9...

All major parts were made of 1" thick 4140 steel hardened to 47 HRc. I tried to cut the serrated swivel-jaw portion with the metal planer, but switched to machining on the milling machine after one face because my arm was going to fall off.

I chose not to polish this wrench to a mirror finish as it already looks too much like something you would put in a dark place while bending over.

In the end, it worked well and the spring action of the swivel jaw would be useful in modern pipe wrenches.

Wrenches and screwdrivers are now for sale at www.handtoolrescue.com

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Podcast (with Jimmy DiResta and Andrew Alexander) - https://anchor.fm/fitzall