How to join t-slot profile with a Standard Nut and Bolt connection

T Slot Aluminium Profiles & Accessories aluminum slot T Slot Aluminum Extrusion Profile CNC Bed, For Construction, Thickness: ; Ships from Bengaluru ; Delivery Location All India and outside India ; Shipping aluminum t slot track My question is - why use expensive extruded aluminum T-slot? I mean, for a CNC router it makes sense because you need sub-millimeter

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