Powerbuilt 648940 Heavy Duty Lever Grease Gun Uses standard 14 oz. cartridges or hand pack 10,000 psi Lightweight, durable die-cast aluminum head with bulk loader fitting and air bleeder valve No-slip textured and chrome-plated barrel finish Rubber grip lever handle for ease of use Working pressure - 10,000 pounds per square inch Air release valve 2 way loading: cartridge or bulk grease Includes 6 inch steel extension and coupler