Alemite ALE586B 14.4 V Li Ion Grease Gun With 2 Batteries Driveline Adapter Safety bypass and overload systems FIL FR4211H Safety bypass and overload systems prevent cylinder damage and restrict use beyond the ASME PASE load limiting standard this kit provides the force required for demanding collision repair and body restoration work weight and balance for comfortable grip and less physical strainPatented automatic universal follower no need to flip follower when changing loading methodsChrome plated barrel for unmatched durabilityPowerful 2 Ampere hour batteryUp to 15 cartridges of grease per charged battery5X less self discharge vs Manufacturer Part Number: 586 B