It can be either.The little bolt that connects the two scissor blades is considered the fulcrum (axis of rotation).The distance between that fulcrum and the handle of the scissors where you're...
A first class lever takes place when the fulcrum is between the force and load. This is possible by lifting the pole and balancing it with your hand. A second class lever takes place when the load is...
A crane is a first class lever when it is winching in or out the rope attached to a load. The crane becomes 3rd class lever when it's boom is luffing, i.e. it is being lowererd or raised.
A lever is a rigid bar that is free to rotate, or pivot, on a fixed point. The fixed point on a lever is a fulcrum. Frist-Class LeversSecound-Class LeversThird-Class Levers