Designed to help with framing and add-in components. The Half Clamp e-blox is fabricated from 6063 Aluminum, which is black anodized.  It is available in the above sizes.  Half Clamp e-blox are used to sandwich a rail system between it and another e-blox. This e-blox can make a quick swivel mount and or a light structural joint.  The half clamp’s narrow width allows access to hardware holes in adjoining e-blox. The Narrowness of the  Half Clamp sacrifices a little strength for a lot of convenience.