This is an overcurrent protection element that shuts off the current by the metal melting in the event of an excessive current.
Blade type fuse.
[Set Contents] 7.5A, 10A, 15A, 20A, 25A, 30A, 15A, 15A, 15A, 15A, 15A, 25A, 30A, 15 Each, Fuse Puller x 1, Tester 6-24V x 1.