Tecalemit's original lever style grease gun has a solid forged brass head and precision ground piston to eliminate the need for 'O'Ring seals which wear and tear ultimately resulting in messy leakage, loss of pressure and the need to replace them. Fitted with a fill and bleed nipple this gun is suited to bulk or cartridge mode operation, accepting all standard 450g cartridge designs. The barrel design features a coarse machined thread to eliminate cross threading, a strong one piece follower rod with keyhole lock for safety and reliability and a 'flip-over' follower assembly that converts from cartridge to bulk mode without the need for disassembly. Delivery pressure varies with the strength of the operator but this gun typically delivers 7500 psi grease pressure. The TEC450 is the professional's grease gun, used in the mining industry, by primary producers and others who know that equipment reliability relies on reliable lubrication equipment.