Four (4) High Security Locks Keyed Alike w/ 8 Keys. ProSeries Padlocks are designed for /Industrial applications. Limited Life Time Warranty. ATTENTION: If you order two 4-packs they will NOT necessarily be keyed the same. To ensure you get two 4-packs keyed alike, you must order the 8-pack. Ideal for harsh outdoor conditions – exclusive Pro Series Weather Tough cover lock from water, ice, dirt and grime. Solid iron shackle shroud resists harsh physical attacks. The removable cylinder can be replaced or re-pinned. 5 spool pin cylinder for added pick resistance. Dual bearing locking mechanism resists pulling and prying. These locks feature the BumpStop Advanced Cylinder Technology. (for explanation see product details below). Dimensions: 2-1/2 (64mm) wide round solid steel body, each weighing 1. lbs. A 7/16 (11mm) diameter hardened boron alloy shackle with 1-1/8 (29 mm) inside height clearance. Chrome rustproofing provides longer life. These high security, rekeyable 5-pin cylinders with spool pins are virtually impossible to pick. And a dual bearing locking mechanism resists pulling and prying.