Diecast steel combination padlock. Stronger, heavier & cheaper than brass equivalents.
No keys to lose.
Consider the value of property to be protected.
Choose a padlock of suitable security rating.
Use a padlock fitting (ie hasp & staple, padbar, chain etc.) of equal strength to the padlock.
20mm combination luggage lock.
3 wheel recodeable combination (1,000 combinations).
Code changing instructions inside the pack.