Cross Line Laser Level with 2 Plumb Dots - Huepar M-9211G Green Beam Self Leveling 180-Degree Vertical Line and Horizontal Line with Plumb Points, Multi-Use Self-Leveling Alignment Laser Level - - Amazon.com
TACKLIFE Cross Line Laser Level, Horizontal and Vertical Laser Alignment 65 FT | eBay
Johnson Level & Tool - 0.1 to 3,000' Laser Alignment Tool - 56298581 - MSC Industrial Supply