Double banana plug

This thing is meant to gather two banana plugs into a standard double banana plug (19 mm or 0.75 inches distance between plugs)

It uses the banana plug below, any plug with the same shape will work.
You need also a 2 M3 nuts and 2 M3x10 flat head screws

These are affiliate links, it doesn't cost you anything but gives me few cents
Banana plug https://www.banggood.com/5-pair-AMASS-4MM-Gold-Plated-Banana-Plug-Bullet-Connectors-Charger-Adapters-p-1043319.html?p=IH111511352354201706
M3x10 flat head screws https://www.banggood.com/Suleve-M3SP1-50Pcs-M3-Stainless-Steel-Phillips-Flat-Head-Countersunk-Machine-Screw-4-12mm-Length-p-1248856.html?p=IH111511352354201706

PS: It's no flat head screws on the photo because I was out of stock.