The Model 24 Stielhandgranate (English: "Stick Hand Grenade", often called the stick grenade or Potato Masher) was a type of fragmentation grenade invented by the Wehrmacht in 1915, and the standard grenade of the German Heer through the end of World War II. The grenade contained explosive material in a green metal case at the end of a long wooden handle. Unlike most grenades, the Model 24 did not contain fragments, and relied solely on blast effect to harm the enemy. In 1942, the Wehrmacht began distributing a Splittering, or "fragmentation ring", to be fitted around the metal casing. This enabled the grenade to be more effective against personnel. The grenade used a friction igniter, which was quite uncommon at the time. The wooden handle allowed the weapon to achieve a longer range on average than standard grenades.