Laser Tools L56 Concentric Alignment Laser. Solid brass and waterproof. Includes a backlit 5 arc. min. level vial and a machined flat "V" groove. 635nm Bright Beam and 1/8" dia. Aperture included: 2 - "AAA" Batteries included. Dimension: 6.5" L x 3/4" Dia.  | 
