BOSCH universal level 3 cross line laser set (3x 1.5v aa batteries...
Bosch Laser Level GLL3 60XG 360 Degree High Precision Green Light Level 12 Line Laser Level Bosch Professional Power Tools|Laser Levels| - AliExpress
Bosch 12 Lines 3 x 360 Green Laser Level GLL3 60XG Laser Level Projection Marking Line For Home Decoration Level Laser Outdoor|Laser Levels| - AliExpress