The aluminum base with motor mount screws used in the Surveyor and the Treaded Drive Base Kit. It is machined from a solid billet of 6061 aluminum making both solid and a great heat sink. This comes with the 4-40 truss head motor mount screws. 4-40 button head lid screws will need to be purchased separately if needed.
Note: This listing is for the chassis only. All other components are sold separately.