Designed to be tapped with a hammer, which forces either paraffin or a light viscosity oil through the tool into the grease nipple, enabling the penetration of the clogged grease fitting. Manufactured from heavy-duty steel with a built-in hand guard and a flexible hose attachment for reaching fittings in difficult areas. Can be used with the flexible connection attached or straight onto a grease nipple. Supplied with two spare plunger seals.