John,
Visit your local equipment supplier,for they should have different grades plus hooks to choose from also information.
I have couple of 1/4"heavy duty chains about 15' long,and one 3/8 heavy duty about 20' long.
Don't remember the grade for its been 25+ years /w3tcompact/icons/shocked.gif when I purchase them,but have held up well. /w3tcompact/icons/shocked.gif
Its not to late to add heavy duty come along on your Sanata list, /w3tcompact/icons/smile.giffor they also come in handy I found out useing a tractor. /w3tcompact/icons/wink.gif
Thomas..NH /w3tcompact/icons/wink.gif