A grease gun is a tool designed to apply lubricating grease under pressure to mechanical parts via grease fittings (zerk fittings).
A 2-speed grease gun offers two operating modes:
- High-flow / low pressure mode — pushes grease quickly when resistance is low (e.g. filling lines, free fittings)
- High pressure / low flow mode — delivers grease under much higher pressure to force through tight or blocked fittings
The ability to switch between modes gives you more control, efficiency, and the capacity to handle both routine greasing and tougher, clogged fittings.

