Peak Design SLL-BK-3 Slide Lite, Mirrorless Camera Strap, Black

Does anyone know the difference between the original strap and this one? thanks

Does the strap have any internal padding like the larger version?

Does this strap come with v3 or v4 anchor links

The little part that is to be mounted on the bottom of the camera. Dos is it come with a key? As I don't have one to tighten the part to the camera.