Need to know what this is

[scotttt1970]

I found this near a old allway saw while metal detecting today and an wondering if someone can tell me what it is and what it is for. I know it looks like some kind of mini vice, but the four teeth and grooves makes me believe it is a specialty tools for something specific. Any knowledge would be greatly appreciated. Thanks in advance

[Papaw]

Probably a grounding clamp to use on a grounding rod near an electric service drop.

[scotttt1970]

Im not sure but this does not close all the way. It only closes a certain amount. The bolt is the the vice tightener . Thanks for the response

[scottg]

Definitely a clamp for holding 2 ground wires together. They come in sizes and I can't tell what size you got.
But lay a couple pieces of copper cable in there and tight up the bolt for yourself.
You'll see.
   yours Scott

[harwill]

Ditto on the cable clamp.  I used to pick 'em up when I was a kid and use them as a miniature vise to hold model airplane parts.

[johnsironsanctuary]

With the good sized teeth inside, they are probably for aluminum.  When mechanically connecting aluminum wire, you have to pierce the oxide in order to make a good connection.

[Aunt Phil]

It's what is left of a primary tapping bug after somebody removed the jumper connecting stud.

The part you have was put onto the primary after the insulation was removed and tightened onto the primary to feed the jumper going to an intersecting primary or a fuse for a transformer.

There might be an REA part number on it as that style was very popular with cheap utilities.   

Upgrading of primary from 4160 volt to 7200 volt made this bug obsolete and it was replaced with stick bugs for lineman safety as lines were rebuilt.

[amertrac]

That's what it is a grounding lug it also holds a ring on the side of the bucket for quick and handy tool holder as long as OSHA was not around bob w.     like the safety switch on moving the truck without putting the bucket all the way down . NO WE NEVER DID THAT bob w.