1004 is a 1.00″ x 1.00″ fractional 10 series square T-slot profile with two opposite open T-slots, one on two 1.00″ faces. The profile has align-a-grooves to assist in alignment when connecting profiles. The 1004 profile is compatible with 10 series fasteners. The placement of the T-slots allows support structures or large panels to be easily placed into them while lending itself to projects such as guarding, furniture or displays.