The keyway refers to the specific shape and configuration of the keyhole in a padlock. Heavy-duty laminated padlocks often feature a standard or high-security keyway design. High-security keyways incorporate intricate and complex shapes to deter unauthorized key duplication or picking attempts. The corresponding key is uniquely cut to match the specific keyway, providing secure access to the lock. Additionally, some heavy-duty padlocks offer the convenience of a rekeyable or interchangeable core system, allowing users to easily change the lock's keying configuration without replacing the entire lock.

Heavy-duty laminated padlocks are designed to withstand various weather conditions and environments. The materials used in their construction, such as laminated steel and corrosion-resistant coatings, provide protection against moisture, dust, and harsh outdoor elements. Some padlocks feature additional weather-resistant features, such as rubber or plastic covers, to further shield the lock mechanism and keyway from the ingress of water or debris. The weather resistance of these locks ensures their reliability and functionality, even in demanding outdoor applications.