The Brick is a Yellow Class weapon used as a lure and it's stored on the back of James/Daniels/Leos belt. Bricks can be seen throughout the streets of Carcer City and Cottonmouth. Bricks are a multiple use lure item, meaning they can be reused once picked up. The brick can be used to daze a hunter if thrown at his head, if James/Danny/Leo is quick enough he can get round behind the hunter and execute him.
In Manhunt 1 and 2, Cash/Daniel/Leo can kill hunters, by throwing a brick multiple times in the hunters head.
In Manhunt 2, a brick is required to enter the Strip Club and Fetish Dungeon by breaking a window.