Mac Tools' two new grease guns, models GG53HD and GG63HD, guns boast cushioned grip handles for comfort and heavy duty bodies for maximum durability. Each gun features a pump ratio of 40 to 1 with a 14 oz. capacity. The Continuous Shot Grease Gun, GG63HD, features continuous grease feed with one trigger pull, a heavy duty cast aluminum body for durability and long life and an output of 288ml/min. The Single Shot Grease Gun, GG53HD, features heavy duty composite body weight of 2.2lbs., 3-way loading and an output pressure of 3,600psi.