... treatment for rust proof 1. unique construction: Angle bars can be assembled easily with corner plate and ... according to users' requirement.3. Versatile steel slotted angle is generally used to make simple shelves and ... can be connected with screws, and without welding.equal angle bar sizes: 1" x 1", 1.25" ... accessories: 2pcs corner plates, 6sets M6x12 screws)unequal angle bar sizes: 2" x 1.5", 2.25 ...