Øvelseshaandbombe M/23 (Drill hand bomb M/23) has 1mm thick walls except for the centre piece which is 2,5mm.
It is loaded with a special drill cartridge called "Øvelsetændpatron M/23" (Drill igniter cartridges M/23) for practice throw,
When it explodes the expanding gasses escapes through the hole in the brass nut located at the bottom of the grenade.
For demonstration purposes it is loaded with "Prøvetændpatron M/23" (Test igniter cartridges M/23).
The grenade can be used again and again.

Total length: 129mm , Length body: 100mm
Diameter: 65mm.
Weight: 350gram.
Fuze delay: 5.5 seconds.