Throwing stars are a Ninja training weapon that’s also known as shuriken. This training weapon is small enough to fit in the palm of the hand and usually features three to eight sharp points. They’re used by ninjas who have excellent hand-eye coordination. It can also be added to a collectors collection of martial srta training weapons. The six point star from Shen Sports is made of heavy carbon steel and measures 10.8 cm in diameter. The star weighs 100g.