T Slot Aluminum Profile

EX-1010 – 1″ x 1″ Smooth T-Slotted Aluminum Extrusion aluminum tslot MiniTec is a high quality and comprehensive line of t-slot aluminum extrusions and components MiniTec is ideal for building safety guarding or fencing, sliding aluminum t slot rail Leading T-Slot Aluminum Extrusion Manufacturers A T-slot aluminum extrusion is an aluminum bar that has been shaped, or extruded, into slotted profiles either

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