Retractable caster wheels

PC Stand Computer Tower Stand with Caster Wheels Universal Retractable Mobile CPU Stand Rolling

4PCS Leveling Machine Caster Retractable Top Plate Leveling Wheel Industrial Machinery Horizontal Adjustment Wheel

4Pcs Heavy Duty Leveling Casters 360 Degree Swivel Retractable Caster Wheel with Rubber Foot for Furniture Equipment Workbench

Gate Wheel Heavy Duty Helper Universal Degree Swivel Retractable Spring Loaded

SucceBuy 2.5" Set of 4 Workbench Caster Wheels Side Mounted Retractable Stepdown Wheel 360° Swivel for Tables and Equipment