2 grenade (also known as Hales pattern and Mexican pattern) is a percussion cap fragmentation and rifle grenade used by the United Kingdom during World War I.
[4] When World War I broke out, it soon became obvious that the standard British grenade, the No.
2 grenades made by the Cotton Powder Company.
2 made the grenade problem worse for the British, as there had to be separate detonators for the No.
2's explosive was changed to Tonite so that it could accept more common detonators.
The Mk I has a 16 in (41 cm) long handle and one cloth streamer, while the Mk II has a seven-inch long handle and multiple cloth streamers.
The 7mm model was produced for Mexico and was designed to fit into the M95 Mauser rifle used by the Mexican Army, while the 8mm model was designed to be used in the Lebel rifle.
Instead of a handle, the aerial bomb variant has only a cloth streamer.