Adjustable Shop Stool Creeper Seat. Shop stool creeper seat features pneumatic adjustment. Adjusts from 15" to 19 1/4". Shop stool creeper seat has 5 solid rubber caster wheels allowing you to roll effortlessly about, tools and all. Solid steel round parts tray is large enough to hold tools, parts, a cold drink, whatever! Shop stool has comfortable padded seat. Maximum capacity - 300 lbs.