Pump filter screen prevents dirt and contamination from clogging the pump mechanism. Integrated no-mar foot design allows operators to rest the tool on flat surfaces. Air-bleeder valve assists in pump priming after cartridge changes. The 20V MAX Cordless Grease Gun powers through clogged grease fittings with a motor that delivers 10,000 max PSI. This battery powered grease gun is ideal for high-flow applications, with the pump pushing up to 5 oz.Control grease flow with the variable speed trigger and reach hard to access grease fittings with the 42-inch flexible hose.