5/8" 3.25 Ton Anchor Shackle
 
Screw Pin Anchor Shackles Brown Pin, rated (drop forged, hot dip galvanized)
Heat treated carbon steel, quenched and tempered.
Size: 5/8in
Working Load Limit: 3 1/4 TON
Weight: 1.37 lbs
US Federal Specs: RR-C-271F