20 years ago, I bought some Pewag grade 100.
We offer high quality grade 120 bulk chain from Pewag. Meets and exceeds the specifications of NACM, ASTM, and O.S.H.A.
www.uscargocontrol.com
This shows 120 but if memory serves me, I bought grade 100. What I liked about the idea of it (and LOVED it after put to use) was/were the
square links.
I knew I'd be using it primarily for dragging logs or maybe pulling a stump out (I just dig them out as a practical reality)
I had used a normal, rounded chain before and seen it slip. Like hoisting a stump after dug out. The stump slips the grip. The square links essentially bite into the log and don't let it go.
3/8" Grade 100 might be over kill.....but I would be using it with an industrial loader/backhoe and later on, obtained a 125 HP (pto) tractor. I'd rather have over kill, than under.
I've never been able to break the chain however, I was once dragging a tree down my road. As it turned out, the weight of the (big) tree was directly on some links and where they interfaced between the log and road, got 30% ground away because of the friction. That was probably 15 years ago, still fine BUT I know that weak link is there. Thought about cutting it out but just keep going.
My International 1066 with 15' flexwing attached once got mired to the axle in mud on far side of farm. Called my next door neighbor asked him to drive the backhoe over there. He came and his friend was with him. I wrapped chain around the frame of tractor. stretched things out, attached other end to stretched out backhoe. I started pulling with the hoe while he was on tractor slowly letting clutch out. Got it out, his friend (who said he worked in some kind of steel sales capacity) he said he was just WAITING for that chain to snap given the load it was under. Nope, didn't happen and he left a believer.
I am a BIG fan of this Pewag stuff.