You can forget the key.
You can set your own number combination yourself - and as often as you like. This means that the lock can also be opened by family or friends until you decide to choose another combination again.
The advantages of the Kohlburg chain lock from the type Trondheim again at a glance:
8 mm thick chain - robust protection 10 mm thick lock shackle - extra security 110 cm long chain - comfortably covers street lights 1.5 kg weight - easy transport thanks to practical weight specially hardened steel - important against hacksaws engraved numbers - protection against abrasion.