TF-2633. The Grand Line by TFI includes these heavy-duty crutches. With steel unibody construction, the bariatric crutches offer superior strength and durability, supporting up to 550 lbs. Crutches range in size from adult to extra-tall adult. Large double push buttons allow for quick height adjustments in 1-inch increments. Comfortable contoured armpads and padded handgrips improve user comfort.