POWERTEC 2-3/8 in. Gray Heavy-Duty Workbench Caster with 400 lb. Load Rating (4-Pack) 17000 - The Home Depot
DIY Retractable castors for workbench
Simple retractable workbench casters DIY - Enredando No Garaxe
Workbench Casters - YouTube
DIY Retractable castors for workbench
SPACECARE Workbench Casters Heavy Duty Retractable | Ubuy Jordan
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
BangShift.com Here's A Cool Idea For Making Retracting Casters For Your Welding Table Or Workbench - BangShift.com