Bosch Professional GLL2 Self Leveling Alignment Red Laser w/ MM2 bosch mount | eBay
Universalklemmen MM2 Stativ | Bosch DIY
Bosch universal clamp MM 2 (with clamping range of 10-60 mm and height adjustment of 40-95 mm for fast and flexible positioning of cross line lasers) : Amazon.co.uk: DIY & Tools