Channel Lock Grip Locks

[dmw56]

Saw these at an indoor flea market and had to have them. I've never seen these before. Channel Lock Grip Locks

 

[Bonehead]

I am a tool guy, but I have not seen those before.

 

[donsrods]

Me neither.

Don

 

[Dirtyrat]

so is it a ratcheting handle so you can attach them using one hand and not have to adjust the gripping pressure?

 

[bruno]

I'm still trying to figure out how they work!

 

[dmw56]

You pull the ring around the handle back and it opens the jaws. Let it go and closes around the object. Pull the large handle and it locks. The smaller handle releases it. You don't have to adjust a screw to clamp it.

Here's an ad from 1968.
http://www.classicadshop.com/productdetails.php5?id=4215

And some more info.
http://www.georgesbasement.com/galootsales/sale07172002/channellockgriplockpliers.htm