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.
π Ultimate Notebook Security: Kensington 64050 ComboSaver Lock and Cable for PC/Mac
10 Review
Improve your iMac Security with the Kensington SafeDome Secure Lock (K64962US)
11 Review
π Sturdy Combination Lock for Laptop and Notebook Computers: 6mm Thick Black Security Cable Included (6ft Long)
9 Review
Kensington Microsaver Universal Computer Key Lock and Cable Security System 64162a for Desktops
9 Review
Smartphone Samsung Galaxy A50 4/64 GB, 2 SIM, black
82 Review
Renewed Logitech G PRO X Wireless Lightspeed Gaming Headset with Blue VO!CE Mic Filter for Immersive Gaming Experience
122 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