Sources
Every number the page uses, with the words it comes from. Only standards, manufacturers' data and physics; no forum or club figures. Where nobody publishes a figure, it's listed under No published figure.
4x4 recovery · Ropes, straps & shackles
Ropes & Recovery Gear
What a snatch puts through your strap or kinetic rope and its shackles, which ones suit your two vehicles, and what safety lanyards, tree protectors and bridles are each for. With a source for every number.