Here's a nice example of a French 'Grenade Contre fil Barbele'.This is a 1916 version which was larger than its predecessor containing 800g of Chedite. It's smaller brother contained 400g of Chedite
It was basically a sheet metal cylinder with a wooden plug and a stick with a hollowed out centre containing a traction igniter.
Its main use was for blowing up barbed wire.
Pictured next to an M16 stick grenade for scale.