Bypass loppers work like scissors, but have only one movable blade. The fixed blade is usually unsharpened, while the movable blade has a sharp edge.
The sharpened blade presses the branches against the unsharpened blade, which provides resistance by pressing the branch against the blade to make it easier to cut through the wood fibers.
Bypass lopper blades can be hooked or curved to keep twigs and twigs from slipping out of your hands during use.
Loppers with anvil
Instead of two blades, anvil loppers have one pointed top blade and a flat anvil in place of the bottom blade.
The anvil can be made of a softer metal than the blades, providing a "sacrificial" surface for the blade to press on while cutting.
The sharpened blade presses the branches against the anvil, which provides resistance, allowing the blade to more easily cut through the fibers of the wood.
polar fleas
Instead of two handles, the pruner has one long "pole" handle with jaws mounted at the top; The jaws include a pulley system that is used to open and close the jaws.
The cord is pulled to actuate the pulley system and the lever is lowered to close the jaws. The lever and pulley system together provide a mechanical advantage, meaning that the pressure applied by the user pulling on the cord is multiplied at the point of cutting.
Pole loppers are used to cut branches at the very tops of trees and tall shrubs, which conventional two-handed loppers simply cannot reach.
