10mm six-sided chain links made of 3t manganese steelWeather resistant nylon sleeve prevents scratches to painted finishesPin-less link design secures chain to hardened deadboltIncludes 3 keys: 2 new `I` keys and one with a high-intensity LED light10mm4` 8.6`/ 143.86cmKeyBlk/Org8 of 10UPC/EAN/GTIN: 720018005902