the suspender buttons are a sort of rivet type deal. You poke one half of button assembly thru the inner part of waistband of the pants, insert & attach the button section to that. Requires light hammering to securely join the two sections.
I have these on pants (...both snow& work) have used them when I was gaining weight & getting a little too rolly polly for the pants! They have never pulled thru even with a Heavy load!
The clip on kinds will shred your shredding gear! If you get new stuff every year? Then get the cheap ones! If you keep stuff longer than a season or want it kept in good shape? Get the Carhartt!!!