K & L Supply Company Fat Jack Center Jack The K & L Supply Company Fat Jack Center Jack features a broad deck equipped with a rubber non-skid pad, enhancing lifting area for superior stability. Features: Lifts front or rear of bikes Works with the Mc464 Fat Jack dolly 16 L X 10 W Minimum Height - 3.5 Maximum Height - 13 Capacity - 1100 Lbs. Note: Use with the K & L Supply Company Fat Jack Dolly to easily move bikes around the shop.