Overview Image Gallery
The bolas consist of a pair of balls containing Gravity Dust connected with a wire. When thrown, they wrap around the target and the gravity Dust connects both ends, effectively restraining them. They can also be wrapped around a person's wrists, acting as handcuffs.
When the bolas is deactivated, the Dust inside becomes inactive, as well. This is shown in "A New Approach", when the purple glow fades after the bolases are taken off of Ruby's group.