A joint for connecting together framework members (10, 12) inside one of the members two arms (48) which protrude from one end of that member. The protruding portions of the arms have grooves (56) therein and teeth (66) beyond the grooves. The grooves and teeth face away from one another. The member (10) has a slot-like entrance (24) bounded by lips (20). With the protruding ends of the arms close together, the arms are inserted through said entrance, the lips entering the grooves and the teeth hooking behind the lips. A screw (88) passes through one of the arms and can be tightened to bear on the other of the arms to force them apart. A resilient clip (72) holds the other ends of the arms in place while simultaneously urging said one ends apart, the clip providing sufficient friction to hold the arms in position with respect to the lips. The arms are symmetrical in form with a tooth and groove at each end so that when the resilient clip (72) is removed, the arms are usable for connecting two parallel members.