Mini Paracord Keychain Carabineer Clip.

https://smile.amazon.com/gp/product/B01LZK0RAA/ref=oh_aui_detailpage_o06_s00?ie=UTF8&psc=1

Tie a loop at the end of the safety line and thread through the hole in the
carabineer.

Weight: 2.1g (per piece)

Length: 2.5cm/0.98" (Approx.)

Max Width: 1cm/0.39" (Approx.)

Hole Diameter: 0.5cm/0.20" (Approx.)

Opening Mouth Width: 0.3cm/0.12" (Approx.)

Strong spring.