That plastic dip is too much work for wrench handles for me.
I will get some properly sized heat shrink and slip it over
the handles, then heat it up with my heat gun (a hair dryer
on high might work too).
I’m sure I have some shrink in my electrical box, but you can find it on Amazon and elsewhere.
If only Radio Shack were still around.
An alternative might an auto supply store such as NAPA.
Take the wrenches with you and size it up. If you don’t
think one layer is enough get enough for a second layer.
If you don’t like the idea of heat shrink how about hockey tape?
One $2 roll will give you enough to do a dozen wrenches.