This DeWalt cordless grease gun set is the perfect tool for professionals who do a lot of lubrication jobs. The powerful motor provides a maximum pressure of 10,000 PSI to power through clogged grease fittings. The pump delivers up to 5.0 oz/min., which is ideal for high-flow applications. Up to 16 cartridges can be used with a full charge of the DeWalt 20 V MAX (4.0 Ah) battery. The variable speed trigger provides precise grease flow control, while the extra-long, flexible hose is designed to let you work on hard-to-reach grease fittings. A bright LED light helps locate grease fittings when there is little to no lighting. The innovative pump filter screen prevents dirt or other contaminants from clogging the pump mechanism. The integrated no-mar foot design means that the tool can be placed on flat surfaces. Finally, the air discharge valve helps pump priming after each cartridge change.