What is the difference between gas-lift and screw-height adjustment on a drafting stool?

Gas-lift (pneumatic) adjustment uses a compressed nitrogen cylinder and a lever — one hand press changes height instantly. Screw-height adjustment requires rotating the seat or column mechanism multiple turns to raise or lower the seat, which takes 30–60 seconds and can be impractical for shared workstations with multiple users. Gas-lift is the commercial standard and is strongly preferred for any stool that multiple users will adjust throughout the day. OfficeFurniture2go.com stocks pneumatic gas-lift drafting stools — call 1-800-460-0858.