The granite surface plate stands that we offer are manufactured specifically to match up with the Granite Surface Plates that we offer. The Federal Specification GGG-P-463c recommends three fixed points to support the surface plate and minimize sag and warp. The Granite Surface Plates that we offer are marked on the bottom of the plate to coincide with the supports on the top of the stand. When aligned with each other they uphold the accuracy of the plate. These Granite Surface Plate Stands are manufactured to support the weight of the surface plate plus 50 pounds per square foot load. These Granite Surface Plate Stands are made for each plate to meet a 36” working height from the floor to the top of the plate unless specified otherwise.These Granite Surface Plate Stands include locking casters. This castered stand has two locking swivel and two rigid casters to allow the Granite Surface plate to be easily rolled. The plate can be leveled with the bolts on the top of the stand.Specifications include... Steel Construction Built to hold a 48" x 96" Granite Surface Plate Castered Stand