RopeLab equipment information series: Episode 1 - Carabiners

I've been fortunate enough to spend face-to-face time with quite a few carabiner manufacturers over the years.  In this presentation I try to share some of the things that we don't often hear from the usual places.
I also have written most of this in the notes I distribute with my workshops:

https://www.ropelab.com.au/files/phys...

00:00 Introduction
01:18 Strength and MBS
02:33 Material: Aluminium or Steel
05:25 Dropping hard surfaces
06:12 Fatigue
08:45 Carabiner shapes
12:44 Gate and flutter
14:00 Gate locking mechanisms
15:45 Screw gates
17:00 HMS
17:30 Auto-locking
19:00 4-action auto-locking
21:20 Inspection and deformation
25:30 How much load is too much?  Design Factor