From World of Ptavvs:
"Jansky's lost both his eyes and most of his face. Knudsen will be a cripple for nearly a year; you cut his spinal cord. With this." He pulled the disintegrator out of a drawer. "Why? Did you think it would make you king of the world? That's stupid. It's only a hand weapon."
"It's not even that," said Kzanol. He found it easy to speak English. All he had to do was relax. "It's a digging or cutting tool, or a shaping instrument. Nothing more."
"Okay. How does this innocuous tool work?"
"You push that little button and the beam starts removing surface material."
"That's not what I meant."
"Oh. Well, it suppresses the… charge on the electron. I think that's right. Then whatever is in the beam starts to tear itself apart. We use the big ones to sculpture mountains."
The one that Lexi bought and that Dan now has hidden in his gear is the Slaver style model.