SPACEKEEPER Workbench Casters Kit 880 Lbs - 3 Inch Heavy Duty Retractable Caster Designed for Workbenches Machinery & Tables, 4 Pack

From Amazon, the 880lb set here: https://www.amazon.com/dp/B08FDFJXK5?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_1&th=1 It comes with wood screws so you need to get your own hardware (bolts, nuts, washers). I have a coffee can of spare parts that I save so I was able to find what I needed in there.