Yes that is what you call an adjustable roof jack
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I melted several of those down a few weeks ago and ended up with .2% tin in the alloy.
More reasons than a few holes from nails why they don't reuse them. One if you reuse you can't sell a new one.
#2 is the biggie, If you reuse you can't give them to a bullet caster.
Leo
I buy them every chance I get ...you'll find clean ones if your lucky ..
I melt all roof flashing and vent boots separately outside. It usually has tar and paint on it and smokes a good bit. I melt in 3lb coffee cans in fire. Pour melted metal out under crud, then throw can away. They will only stand one use before they leak themselves.
Well, a good friend to have is a roofer.
My neighbor is a roofer and has supplied me with a bunch of old lead flashing and roof jacks that have lead sheeting soldered to them.
I cut out all the soldered joints and melt them separately for a source of tin.
The other lead is melted and poured into muffin pan ingots.
The lead tested at 5-6 BHN.
The solder joints came in at BHN: 7.8