A sickle, bagging hook, reaping-hook or grasshook is a single-handed agricultural tool designed with variously curved blades and typically used for harvesting or reaping grain crops, or cutting succul
Nepalese sickle from Panchkhal
One of 12 roundels depicting the "Labours of the Months" (1450–1475)
A very early sickle, c. 7000 BC, flint and resin, Tahunian culture, Nahal Hemar cave, now in the Israel Museum.
A billhook or bill hook is a versatile cutting tool used widely in agriculture and forestry for cutting woody material such as shrubs, small trees and branches. It is distinct from the sickle. It was
Sickle
…cutting field beans and other leguminous crops that were used for fodder and bedding for livestock. Sometimes confused with the heavier and straighter billhook used for cutting wood or laying hedges. While the scythe or bagging hook blade was heavy enough to remove young growth instead of, say, shears for…
Modern billhook with saw blade, used in bushcraft activities
Traditional Devon pattern billhook made by W. Gilpin in 1918; original handle has been replaced. 12-inch/30 cm ruler shown for reference.
Page from the 1939 Nash–Fussells catalogue, showing a variety of types of bill hook with caulked handles
Billhooks for sale at Ludlow market, Shropshire, England