User Summary: The Motorized Drawbridge Upgrade Pack is part of the Castle Builder System. It is made of "Dwarvenite" and includes some metal and magnetized parts. This item was initially available as an add-on to a pledge level during the Castle Builder System Kickstarter. The item comes in both painted and unpainted versions. CBS parts are from the City Builder System series. The Motorized Drawbridge Upgrade Pack comes with these 23 pieces: (1) Winch Motor (1) Magnetic Necromancer Crest (6) 3/4 Solid Insert Wall (1) Magnetic Gargoyle Crest (1) Magnetic Runic Crest (1) CBS - Arrowslit Wall (1) Magnetic Lion Crest (1) CBS - Extreme Offpack Door Wall Left (1) Drawbridge Winch Wall (1) CBS - Extreme Offpack Door Wall Right (2) Castle Door (1) Iron Portcullis (1) 4x4 CBS Murderhole Floor (2) Dungeon Corner Post (2) High Crenellated Corner