Looks light, but I hope you've trialled it on a cold, dark night (or in the cellar with the light off and someone pouring water over your face and hands).
I was once told to never leave the house without a chain tool. Luckily I listened to the advice, and two weeks later my chain snapped. It was a late October night, raining heavily, ten miles from the nearest train station, I was on my way to work to do a small but critical job for the next day's orders, and if I hadn't had the chain tool, and known how to use it, I'd have been scuppered.
As it was, I fixed it and had a great ride to work and then home.