Fix anything, anytime. Always keep a pack of zip ties on your ebike and make sure to make it back home.
Fix a broken freehub, hold a tire on a rim, fix a broken chain or derailleur, hold a cable in place, secure a broken bike stand, hold a brake lever or a damaged fork. You got it, these guys save your life when riding off road.
Pack of 100 units in 200mm x 2.5mm (most used).