Screw with screw cap

How do you install screw with screwcap?

https://youtu.be/TzI6hB_5yZc

Right click link above then press ''copy link address'' to send to customer

Small screw with screwcap

Big screw with screwcap

Black small screw with screwcap

Black big screw with screwcap

Gold small screw with screwcap

Gold big screw with screwcap