Are these two or four link chains, how many links apart are the cross links? What type of steel are they made of? Do they come with tighteners?

I got an answer to this question prior to purchase on the 29th from an associate at Lowes 1641 where they are still a stock item. These are 2 link chains have 1/8" chain links and do not include any springs to snug them up. The links are a bright silver but they do not state what type metal they are. Arnold's photo on the box is a tractor with 4 link chains. They give two sizes on said box, " 20" x 8" x 8" " and " 20" x 8" x 10" " the metric sizes given are " 50.8cm x 20.3cm x 20.3cm " and " 50.8cm x 20.3cm x 25.4cm " and they recommend one use weight kit 490-900-M060.

They appear to be two link chains, but Lowes gives very little info. on them. Here is the manufacturer: (763) 421-8165 3331 Saint Francis Blvd, Anoka, MN 55303 Arnold Mfg.