protective sheath for a pruning saw or other tool.
scabbard (Wikipedia)
A scabbard is a sheath for holding a sword, dagger, knife, or similar edged weapons. Rifles and other long guns may also be stored in scabbards by horse riders for transportation. Military cavalry and cowboys had scabbards for their saddle ring carbines and rifles for transportation and protection. Scabbards have been made of many materials over the millennia, including leather, wood, and metal such as brass or steel.
Most commonly, sword scabbards were worn suspended from a sword belt or shoulder belt called a baldric.