 Locks made of hardened steel are more vulnerable because they are less prone to damage during the bumping process that might cause a cheaper lock to jam.In the United Kingdom, a British standard TS007 Kitemark has been legislated which benchmarks the effectiveness of bumping at 1-star level and 3-star level.The former implies a minimum bump time of 1 minute while the latter offers much greater protection at a minimum bump time of 10 minutes.