The Keyless Security™ Mini-Padlock from Rifkin is a high-security lock that cannot be opened or picked without leaving evidence of a breach. This patented innovation represents a significant security improvement compared to products that rely on keys or combinations. The Mini-Padlock uses a one-time-use security seal that is laser engraved with non-repeating numbers or a barcode. To secure the padlock, users simply insert the numbered seal to the closure slot. If the security seal is missing, broken or numbered differently you can be certain that the lock and chain of custody have been compromised. For more information call 800-458-7300 or visit www.arifkin.com.