Brownell's innovative keel stands are designed to save time and labor. Rather than stacking and cribbing wood blocks, these are placed under the keel and quickly adjusted to the proper height, thereby saving labor and increasing efficiency and profit. Stands stack neatly for storage when not in use. SWL 20,000 lbs. (9,100 kg) each. Height: 28" to 41" (71-104 cm). Weight: 42 lbs. (19.1 kg).