These made the product "CTM Men's Big & Tall Non-Elasticized Button End Work Suspenders, Khaki" into clip-on suspenders, and they seem very easy on the fabric, where as the clip on suspenders I've bought had teeth that damaged my pants, over time.  These aren't very loud, in a bathroom stall, so if your coworker is in the next stall you don't have to wonder if they're hearing you make more metallic clanks than an old, rust robot, as you clip those pants to the button-style suspenders or work/industrial suspenders I use them for.  Some people say one of them is often defective, and since it comes with an extra one, I gave it a try, but none of mine were defective.  I like these so much I'm going to buy a pair for every button suspenders I ever own and never take them out of the suspenders (which prevents losing them, as well).