These are homemade from number #12 bare hooks. I melted solder

How to Solder Without a Soldering Iron

How To Solder Wires Like A Pro

How to Solder: An Illustrated DIY Guide to Making Your Own Cables

Basics in Soldering 12 Gauge Wire for Traxxas connector

Is it impossible to solder broken wires in headphones because

Franky's Kelvin Clip kit.

Making your own custom USB cables

Wrought iron double S-grind nakiri : r/knifemaking

Home Improvement Adventures — AZ DIY Guy

Mandala Crafts 60 40 0.6mm 0.8mm 1mm 1.5mm 2% Flux Rosin Core

Prototype logic board used to drive 4 H-Bridge modules, preventing damage to the H-Bridges. : r/diyelectronics

DIY: How to Solder Wire

Can we use fevikwik instead of solders to join earphone wires? - Quora

Ring broke? : r/jewelry