Designed to fit neatly into 20kg bulk grease buckets so you can easily and cleanly bulk fill your grease guns in seconds rather than shovel the grease in. the unique design means no more mess trying to fill grease guns by hand. Fill grease guns directly from the grease bucket without any mess or wastage. Simply screw the grease gun barrel to the follower plate, insert into the grease bucket, push down while pulling the suction handle, causing a vacuum and instantly filling the gun.