How do I prevent a drafting stool from wobbling?

Wobble in a drafting stool usually has three causes: loose caster stems, a worn gas cylinder that no longer holds position firmly, or loose bolts in the seat plate or back assembly. First, push each caster in firmly to reseat the stem. Then tighten all visible bolts. If wobble persists and the chair feels unstable when shifting weight, the gas cylinder or tilt mechanism may be worn and should be replaced. OfficeFurniture2go.com provides warranty service and replacement parts — call 1-800-460-0858.