Parents, this kids bike lock from Büchel is such a smart way to teach your children about responsibility while keeping their bikes safe! It's a 65cm long steel cable lock (they also make a 120cm version if you need more length) with a 4-digit combination that you can set to any number you want - that's 10,000 possible combinations! The 10mm thick steel cable is strong enough to deter casual theft but still lightweight enough for kids to handle easily. What we love is that it's completely key-free, so no more worrying about lost keys at the playground or school. The colorful design makes it fun for kids to use, and setting their own special code helps them remember to actually use the lock. It's not just for bikes either - works great for scooters, skateboards, bicycle trailers, even strollers when you're at cafes or parks. Büchel has been making quality bike accessories for over 100 years, so you know this isn't some flimsy cheap lock. It weighs between 200-300 grams, so it's light enough for little ones to carry in their backpack. Seriously, if your child is starting to ride their bike to friends' houses or school, this lock gives you peace of mind without being complicated to use. It's one of those simple products that just makes life easier for everyone!