Accessory DK 20. The DK 20 Professional is a robust ceiling clamp designed for secure attachment and reliable support in ceiling applications. It offers precise height adjustment with a range of 10 cm for accurate positioning in leveling tasks. The rubberized roller and its large gripping surface ensure comfortable handling. This ceiling clamp is compatible with the GLL 18V-120-33 CG and the LB 10 mount, making it a versatile accessory for professional users. It optimally ensures safe and accurate positioning of tools in ceiling applications such as aligning lights and installing suspended ceilings or HVAC ducts. The DK 20 Professional offers various mounting options. It can be easily positioned using the clamp or the screw hole, making it a straightforward addition to the toolbox. Furthermore, its robust design allows it to withstand the toughest conditions – it provides reliable support when it is needed most. Ceiling clamp DK 20.