This lightswitch-like thing with a slit in it. On the bathroom wall in my office. : r/whatisthisthing
Convenient Key Organizer - Switch Hooks
KeyCatch: Magnet That Screws Into Light Switch - Hold Your Keys
Extra Heavy Duty Industrial Grade, Locking Toggle Switches, General Purpose AC, Single Pole, 20A 120/277V AC, Back and Side Wired Key Guide | HBL1221L | Hubbell
File:Locking switch.jpg - Wikipedia
A key to use the lights : r/specializedtools
Leviton 20 Amp Industrial Grade Heavy Duty 4-Way Locking Switch, Gray 1224-2GL - The Home Depot