The Oxford OF159 HD Chain Lock is a heavy duty chain and padlock and is SoldSecure. Sold Secure is an independent, non-profit making organisation dedicated to reducing the risk of theft by testing security products. The same methods of attack used by criminals on the street are replicated by Sold Secure in the assessment of security products. Many insurance companies offer substantial reductions to those who use SoldSecure approved products. This offers hardened 9.5mm square link chain, tough double locking padlock with hardened steel shackle which doubles as a disc lock, key replacement service and key dust cover.