These straps are narrower than the ones I am used to, and thinner overall - so that the elastic doesn't have the pull other suspenders do.  The entire strap is elastic though - so they'd be nice for light duty - might even qualify as dress suspenders.  The clasps are of similarly light to medium duty construction.  Attempting to fasten them on a denim jeans beltloop resulted in slight bending.

I wear these when I won't have a lot of tools in my pockets.