The Roberts manual lift has two positions available and helps you change from flat sewing position to free-arm sewing position (or change the bobbin) easily and quickly by use of a convenient lever. It also may be lowered into a cabinet or table for hideaway position. The height is adjustable for normal sewing. The lever height is adjustable for free-arm sewing. Compatible with Roberts sewing cabinets model #699, #898, and #8710.