The Frame Lock PRO SHIELD™ PLUS 5950 offers more ways to protect your bike against theft. The 8.5mm shackle, made from hardened steel, gives a good level of basic protection against a medium risk of theft. The bike lock has an additional locking mechanism to which further accessories can easily be attached, for example the ABUS Frame Lock Chain, CHAIN. What differentiates this model from the Pro Tectic is the ABUS Plus cylinder for high protection against manipulation attempts, e.g. lock picking.