Printed from: https://conservationhandbooks.com/toolcare/sharpening/secateurs-and-loppers/
Secateurs and loppers can be sharpened without being dismantled. Anvil blades should have both edges of the cutting blade sharpened, whereas only the outer edges of the cutting blade on bypass secateurs or loppers should be sharpened. Before sharpening, any hardened sap residue on the blades should be cleaned with a plastic scouring pad and...