Qassam Missile/Rocket (Arabic: صاروخ القسام Ṣārūkh al-Qassām; also Kassam) "...The Qassam rocket (Arabic: صاروخ القسام Ṣārūkh al-Qassām; also Kassam) is a simple steel rocket filled with explosives, produced by Hamas. Three models have been used. They are all free-flying artillery rockets lacking any guidance system. The Gaza Strip has been separated from Israel by a security barrier since 1996, which frustrated infiltration into Israel. ..."
Reference: en.wikipedia.org .