7", contained shrapnel, making it a primitive fragmentation grenade.
In many cases pulling the loop was too difficult for one man to do and it required two men.
[1] For a lone soldier, the best method was to hold the grenade between the knees and pull on the loop with both hands.
However, this often resulted in cutting the fingers in addition to igniting the fuse.
[1] Another danger was that the friction igniter was very sensitive, a powerful blow to the grenade with the detonator inserted could set it off.
6 almost as dangerous as the percussion cap grenades that it was designed to replace.
[1] However, it appears they were still in use up to at least 1917, as grenade manuals made during that time have a section on how to activate and ignite it.