The Allways fuze is driven by a lead ball held between a cone shaped cap and a spring loaded striker.

Since the grenade was an offensive type, designers didn't want to have a heavy part of the bomb flying far away from the intended point of detonation and possibly injuring the thrower.

A thin wire ring locks the two body halves together at a specific place, fixing the overall length, so as not to bind the internal parts.

When thrown the lever was to catch the air and be pulled from the grenade, removing the safety bar from between the firing pin and the primer.

This was an open terrain grenade, as some amount of time and distance was required to allow the mechanism to function properly, which it had a tendency not to do.