Grease guns are handy tools used for applying lubricants and greases to various mechanical or moving parts. They are widely used by mechanics, engineers, and hobbyists alike. Grease guns are designed to deliver lubrication under pressure, forcing it into areas of a rotary bearing which may otherwise be very tricky to reach without disassembly. By far their most common use is on non-sealed bearings, which require regular top-ups of lubricating grease. Grease guns are very often found in a wide variety of both industrial and DIY settings, with common examples including: Auto maintenance, Agricultural vehicles and equipment, Factory, plant and processing systems (e.g. conveyors and other goods-handling machinery), Gardening and landscaping, particularly for maintenance of lawn mowers & chain saw.