Lock and methods for preparing copper tape

The present invention discloses a lock with a copper strip, which is composed of the following components: 64.0 - 65.0% copper, 0.01 to 0.03% iron, 0.001 to 0.02% tin, 0.001 to 0.02% nickel, the balance being zinc and unavoidable impurities. The above components constituting the copper strip having a high drawability and good plastic properties, and the phenomenon does not occur when the pitted surface for lock.