Restore Hardware Wood Furniture Casters Set of 4, Dark Hard Wood Stem Casters with Inserts, 1 1/4" Wheel, 4 Pack

I need these to put on my antique 4 poster bed . These wheels look just like the old wheels . Are these durable enough to put on a bed ?

How high can these raise my furniture from the ground?

Can I buy set of 5 casters? My oak table has a center leg to support leaves.

what size drill bit does this need to make the hole for the stem to go into?