This is a Meko bike lock. It has a five digit combination padlock which you can set to a number of your choice. Having a five digit number is much more secure than the normal four digit options and having this type of lock means that you do not have to worry about carrying a key with you and the possibility of losing it. It has 1.2m chain on it which is enclosed in a flexible and protective cloth sleeve. This covers the heavy duty steel chain which has cut resistance so it is really secure. The cloth will protect the bike from being scratched by the chain.