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 Security Bundle: Maclocks MBPR15BUN Case & Cable Lock for MacBook Pro Retina 15-Inch Laptops
9 Review
Kensington Microsaver Universal Computer Key Lock and Cable Security System 64162a for Desktops
9 Review
Secure Your Notebook with Kensington 64343 MicroSaver DS Keyed Computer Lock
11 Review
π Sturdy Combination Lock for Laptop and Notebook Computers: 6mm Thick Black Security Cable Included (6ft Long)
9 Review
Apple AirPods Pro MagSafe RU Wireless Headphones, White
159 Review
Enhance Your Visual Experience with Logitech C260 Webcam
78 Review
Renewed Logitech G PRO X Wireless Lightspeed Gaming Headset with Blue VO!CE Mic Filter for Immersive Gaming Experience
122 Review
π₯ Logitech C270 Webcam: Crystal Clear Video and Superior Quality
183 Review