yes, but they are junk.
You are going to need 3/8 X 1 inch carriage bolts to make these casters work. Home Depot put 5/16 self tapping hex head b bolts in the caster package. Useless. What are you going to tap into??? Square holes in tool chest legs are a wiggly 3/8 inch.
Four wheels ... two that swivel and two that don't. Also, included are 16 bolts (5/16" - 18 x maybe 3/4" or 1"). You'll want to add your own washers and flange nuts.
No, I use them in my shop and have not observed any markings on the concrete
Yes. You will have to purchase your own bolts to attach them. They do the job, box rolls smooth, not wheel lock
Yes they will
Yes it is I have 2 of the But you have to buy additional bolts and washers because the ones that come with the Casters are USELESS RIDGID 48 in. x 24 in. Universal Storage Chest Model # 48R-OS Internet #300748574 Store SKU #410021
I have always gotten the bolts and nuts with mine. Could be the manufacturer wants you to buy the mounting hardware separately (to make more money), or there could be another SKU that has the mounting hardware with it.
I have always wondered that as well but you have gotten the NEW package . When I bought both of my ( Model # 48R-OS Internet #300748574 Store SKU #410021 ) The wheel kit that was available did NOT have the correct screws in it just some self tapper type so had to go back and get some 1 inch Carriage bolts with Nylon lock nuts At least yours has some bolts that will fit just have to find another NUT
2 7/8" x 3 1/4" Center Lines