The GRL 600 CHV rotary laser level from Bosch - Professional Builder
Bosch GPL100-50G 125ft 5 Dots Point Alignment Laser Level 360 with Integrated Magnetic Mount, Heavy-Duty for Layout & Plumbing, Includes Batteries and Hard Case,Green/red : Amazon.co.uk: DIY & Tools
Bosch Laser Level GLL3-60XG 360 Degree High Precision Green Light 12 Line Level | eBay