The purpose of the grease gun is to apply lubricant through an aperture to a specific point, usually on a grease fitting or 'nipple'. The channels behind the grease nipple lead to where the lubrication is needed. The aperture may be of a type that fits closely with a receiving aperture on any number of mechanical devices. Hi-Line carries a variety of grease guns and accessories including attachments for hydraulic, pin type, standard and giant button head fittings.
