6 Uses of T-Slot Aluminum

Are T-slot tables necessary and is it worth paying more for steel? aluminum t slot table Manufacturer Of T Slot Aluminum Extrusion Table 20*80mm Silver Anodizing For CNC Router Or Engraving Machine Professional Aluminium Profile Factory aluminum slot wheels T-slot aluminum framing but I'm getting rWorkbenches

aluminum profile t slot made for M6 Nuts 100mm grid to attach the plate compact construction TolerancePrecision: +- 0 01 mm 200 mm