Designed especially to lubricate hydraulic hammers used in construction and demolition, the HTL 429 mounts directly on the hammer. Ideal for rental companies that lease hammers and construction profressionals that want to swap their hammers between more than one excavator or other carrier machine. Uses standard 14.5 ounce grease cartridges. Because the HTL 429 operates every time the hammer is engaged into the work surface, you don’t have to stop work to manually lubricate the tool with a grease gun.