A round, rather than square, shape: A round, rather than square, shape: In addition to a pleasant appearance that matches the round shape of LeanTek® tubes and joints, the rounded shape of Trilogiq F-Ms spreads the load over the whole length of the product and not only on the point of contact. This results in much better shock and load resistance. Integral grub screws: In conventional systems holding the rail bracket to the tube require drilling and riveting. This is a slow and laborious task. Trilogiq saves you this effort by offering integral tapped threads on its F-M range. This makes the fitting of F-M fittings to the tube very easy: no drilling, no riveting, just an Allen key, a pointed grub screw and a few seconds are all that are required to fix the F-M firmly to its tube.