Boxcars is slang for a pair of sixes in dice. The Rolling Boxcars Brass Paper Weight is a 100% brass four finger knuckle paper weight with a dice motif carved into it. Between the finger holes on the end are dice that show six on both sides. A one is showing on the die in the middle. The Rolling Boxcars Paper Weight is the perfect piece for any game lovers. Overall Length: 4.25 Inches. Weight: 0.35 lbs.