4400 LB Capacity Long Drum Winch w/Manual Brake. This San-Ei tugger bridges the gap in the tugger line by offering a 2200 lb. capacity. This series of tuggers are known for being very reliable and have been in the San-Ei product line from the beginning. We updated the forward/reverse valve design from the original design. The rest of the MP-W10220 series tugger remains the same reliable 4?piston air motor, gears, drum and brake mechanism that you expect when purchasing a tugger. The MP-W20220 series is considered to be the foundation of the San-Ei product line, having existed since their inception in 1936.