Mastercraft Mobile Base - still in box. https://www.canadiantire.ca/en/pdp/mastercraft-universal-mobile-base-0571628p.html Universal mobile base has a frame that can expand from 12 to 52" - Maximum Square dimension of 36 x 36" - Maximum weight capacity if 400lbs - With 3" heavy duty casters for easy mobility Wheel lock for safe and secure use of base