8506 Granite Throwbot is the Throwbot of the Rock Continent. He has two pickaxes and a Disc launcher arm. Granite can be combined with Judge/Jet, Jungle/Amazon and Energy/Electro to build Ultrarex. Lego Technic Throwbot Granite Rock. Includes; 32 Technic parts, instructions and storage container. Made by Lego in 1999 and long out of production.