The DEWALT Cordless Grease Gun is designed with a powerful motor that delivers 10,000 max PSI to power through clogged grease fittings. The high-volume pump pushes up to 5.0 oz.\/minute for high-flow applications. This grease gun is backed by a DEWALT 3 year limited warranty for added peace of mind. 20V MAX Cordless 10,000 PSI Variable Speed Grease Gun, (1) 20V 4.0Ah Battery, and Charger