It's not what it seems. According to Kensington, there is no master key for these locks. They work correctly, but the master key is not possible.
Kensington Microsaver Universal Computer Key Lock and Cable Security System 64162a for Desktops
9 Review
Improve your iMac Security with the Kensington SafeDome Secure Lock (K64962US)
11 Review
π Secure Your Desktop Computer and Peripherals with the Kensington K64615US Locking Kit
9 Review
π Sturdy Combination Lock for Laptop and Notebook Computers: 6mm Thick Black Security Cable Included (6ft Long)
9 Review
π₯ Logitech C270 Webcam: Crystal Clear Video and Superior Quality
183 Review
Smartphone Samsung Galaxy A50 4/64 GB, 2 SIM, black
82 Review
Sennheiser PC 8 2 Cancelling Microphone
71 Review
Logitech HD Webcam C270: Crisp 720p Widescreen Video Calling & Recording (960-000694), Lightweight and Portable at 3.15 lb.
192 Review