This listing is for one (1) High Security Keyed Alike Padlock w/ 2 keys. ProSeries Padlocks are designed for Commercial/Industrial applications. Limited Life Time Warranty. These locks feature the BumpStop Advanced Cylinder Technology. (for explanation see more product details below). SPECIFICATIONS: 1-3/4in (44mm) wide heavy, hardened steel body with chrome rustproofing for high security with long life and a 1-3/16in (30mm) tall, 5/16in (8mm) diameter hardened boron alloy shackle for superior cut resistance Solid iron shackle shroud resists harsh physical attacks. The removable cylinder can be replaced or re-pinned. 5 spool pin tumbler cylinder for added pick resistance. Dual ball bearing locking mechanism resists pulling and prying. FEATURING BumpStop TECHNOLOGY - Lock bumping a surprisingly simple method of breaking in through locked doors and padlocks - is undoubtedly the newest emerging threat to personal property security. And virtually all locks in use today are particularly vulnerable to bumping. Until now. BumpStop Advanced Cylinder Technology employs an innovative, patent pending design which utilizes a unique reverse rake tapered driver pin, high performance springs and tightly machined cylinder chambers. During a bump attempt, this design prevents the transfer of force from the bump key to the pins and therefore blocks rotation of the cylinder so that the lock remains locked.