This mobile base came on a 3HP SawStop Professional Cabinet saw I purchased new last year. I’ve used this base at the saw for about a year and it really works well but it surely does not turn as tight as I need it to after adding every other piece of equipment to my shop. So I determined to upgrade to the SawStop Industrial mobile base with 4 casters. Sawstop sells this mobile base for $199 new. Good deal for any person on the lookout for one. The bottom is complete and has a set of instructions on install. Feel free to message me with any questions.