This quick disconnect battery clamp has been on 7102 since she arrived in 2006. Quick and effective, it has never given me trouble. Just flip up the cap and off it comes. When in place it completely covers and protects the battery terminal connection from accidental contact with stray metal things.
It is marked as having an 800 amp rating.
I came across a positive and negative set of them later, they'll be installed on one of the other cars when battery cable attention is required.
I also have a disconnect switch set aside. It was pulled from another car, looks like a good piece, with 5/16" solid brass terminals, from Cole-Hersee, made in Boston, USA. According to the label it's only got a 20 amp continuos and a 125 amp momentary rating at 12 volts. Seems kind of low, but it worked fine in the prior application.