Anchoring bracket for the Seville Classics UltraHD Adjustable Workbench sold at Sams Club. Use this bench for holding my X1C and designed these to make sure the bench is nice and anchor and doesn't budge from printer movement. Using 3 of them on my larger 72" long bench.

Designed for this bench:

UltraHD® Height Adjustable Workbench, Granite – Seville Classics