[Paramedic40]

Conventional 68Ws are not trained to pinch off or ligate anything.
I was trained not to pinch anything off- packing and pressure dressings and tourniquets for positioning.
I personally carry a pair of hemostats for splinters and such, but in all honesty, I don't have confidence in my ability to correctly locate and close a bleeding artery in a relevant amount of time. Until I'm trained on it to my standards (which are at least as high as that of the certifying authority) and I'm certified to perform it, it's not a skill I'm going to use.

There is an exception to this- the off-chance of an umbillical cord. That I know how/where/why to clamp.