they're mostly showing off what you can do if you got a chain-making machine,
for the Fixie bike and BMX type..

KMC supplies a normal steel 3/32 half link , i've got one I put on my Brompton
chain
certainly can find the pin to press out, when time comes
to pull it off and soak it clean.

anyhow, 1/8" is just 4/32 after all ..