[Source] The Clan Groogrun vibro-ax was one of the more popular vibro-axes, built on the Gamorrean homeworld of Gamorr by master weapon makers such as Snogrutt. As with all vibro-axes, a power pack supplied energy to an Ultrasonic vibration generator, causing the alusteel ax blade to vibrate thousands of times per second, making it far more dangerous than a normal axe. The vibro-ax had a wooden shaft which held the ax head and power cell. The wooden shaft did little to absorb the vibration of the the blade, so only beings with considerable physical strength—such as the Gamorreans who favored these weapons—could wield them effectively.