Self-Leveling Laser Level,100 Feet Green Cross Line Laser Level, Easily Project 130° Horizontal and 150° Vertical Lines, Magnetic Base & Battery Included - - Amazon.com
BLACK+DECKER BullsEye Auto-Leveling Laser with AnglePro (BDL170) - Line Lasers - Amazon.com
BLACK+DECKER Laser Level, Self-Leveling, 360 Degree Wall Attachment, AA Batteries Included (BDL220S) - - Amazon.com