The first and third picks there have a brass collar under the al knob this is held in place by friction
and is adjustable they have markings on them to indicate cut depths for decoding.
You attach a magnetic pointer to the door and adjust the collar to its start position after applying torque.
These picks are all for pipe keys that is they are all hollow at their tip and all have a bolt thrower which isnt
shown to well in the pics.
There are more but the world isnt big enough to show them all
Next ill be building some pin and cam picks but dont expect to see them up here