T-Slot Aluminum Extrusion, Guards, Workstations & Linear Mot

Profile refers to the sizethickness of the T-Slot bar used Common profiles are 2020 , 3030 , 4040 etc

My question is - why use expensive extruded aluminum T-slot? I mean, for a CNC router it makes sense because you need sub-millimeter

aluminum extrusion t slot Black anodized T-slot aluminum extrusions offer both durability and aesthetic appeal, making them a popular choice for a variety of applications

aluminum tslot T-slots are an unofficial standard for framing systems that consist of square or rectangular extruded aluminum lengths with slots along their sides