The Daystick is a long one- or two-handed club / cudgel (blunt weapon- like a baseball bat). It is used by Judges for riot control and less-than-lethal attacks on aggressive perps. It has a titanium core, as demonstrated when one perp attempted to slice through it with a chainsaw, albeit to no avail.
The Daystick is named as such as a Judge would "beat the daylights" out of a target. This weapon is derived from the previous one-handed baton called a "nightstick" used by modern police.