Asriniey 3 Inch Workbench Caster Wheels Set of 4 Heavy Duty - Retractable 800 lb
WHY RETRACTABLE CASTERS: Traditional locking casters on workbenches may still be unstable or shift under load, and prolonged weight can shorten their lifespan. ASRINIEY retractable caster wheels keep the workbench stable on the floor.