copper rivets, with washers, 200 pack, 3/32 x 3/16, leather fastening, metal connectors, ornamental elements

You get 200 solid copper flat head rivets and 200 washers. See the example how it looks attached to leather on both sides. I use the leather hole maker, baby ball peen hammer on and the plastic mallet.
I used a wood board to cut the hole in the leather with the punch and plastic mallet. I then placed the rivet into the hole flipped over and slipped the washer on and bloomed the rivet end with the small ball peen hammer on a steel block.

Details in mm.
Cap about 4.5mm wide.
shank length 4mm
shank width 2mm
Washer width 8.5mm