Perry Products SN200 Men's Clip-On 2-in Suspenders Black Black/Regular AD

what kind of leather is the middle part where the name brand is?

Are these metal free? My concern is with courthouse and airport security?

Is the part that attaches to the belt made of plastic or metal. I'm looking for medal ones because the plastic ones bend up under the stress.

Do these work if the belt is 1/4" wide? I would like to use these in conjunction with my gun belt.