There's a detonator in it and an inch or two of fuse.
"A Prairie Courtship"
Harold Bindloss
The men were taught how to cut fuses, fix them into the detonator, attach the lighter and wire the whole together preparatory for use against the enemy.
"The Story of the "9th King's" in France"
Enos Herbert Glynne Roberts
There was a quality of awareness in her steady gaze that terrified him for a moment by its implication, which made him feel as if he stood over a powder magazine and that she held the detonator in her hand.
"The Hidden Places"
Bertrand W. Sinclair