The Metal Earth Batman models are amazingly detailed etched models that are fun and satisfying to assemble. Each model starts out as 4 inch square metal sheets and you simply pop out the pieces using wire cutters and follow the included directions to assemble your model. The Bat-Signal is a distress signal device appearing in the various interpretations of the Batman mythos. It is a specially modified searchlight with a stylized symbol of a bat attached to the light so that it projects a large Bat emblem on the sky or buildings of Gotham City. In the stories, the signal is used by the Gotham City Police Department as a method of contacting and summoning Batman to their assistance in the event of a serious crisis and as a weapon of psychological intimidation to the numerous villains of Gotham City. No glue or solder needed. Details: Silver 1.75" x 1.75" x 2.4" assembled size Moderate difficulty level For ages 14 and up Contents: 2 square metal sheets (4" x 4" each) Illustrated instruction sheet