Convenient pull type trigger for easy one hand operation. Die cast head. Textured zinc plated finish for non slip grip. Uses standard 3 oz grease cartridges or can be bulk filled (grease not included). T-handle posi-lock follower rod for sure grip. Complete with 4 inch rigid pipe extension and professional coupler. Produces up to 3500 PSI. Delivers 0.4 g/stroke or 0.6 oz/40 strokes.