BangShift.com Here's A Cool Idea For Making Retracting Casters For Your Welding Table Or Workbench - BangShift.com
Amazon.com: GBL Heavy Duty Retractable Workbench Caster Wheels + Screws - Set of 4 Castor Wheels up to 500Lbs - No Floor Marks Castors for Portable Furniture or Work Bench : Industrial & Scientific
Simple Retractable Casters for Workbench - YouTube
Simple retractable workbench casters DIY - Enredando No Garaxe