10mm six-sided chain links made of 3t manganese steel Weather resistant nylon sleeve prevents scratches to painted finishes Pin-less link design secures chain to hardened deadbolt Includes 3 keys: 2 new `I` keys and one with a high-intensity LED light 10mm 5`3`/160.02cm Key Blk/Org 8 of 10UPC/EAN/GTIN: 720018000815