Abstract: This invention relates to clamps of the kind for releasably connecting a plurality of rods or other elongate members at predetermined angles to each other.According to this invention a clamp of the above kind comprises two half portions and securing means for mutually securing said half portions, each half portion comprising an inner face with a central region on which central region an annular collar 18 is disposed and through which collar a hole 17 for said means is provided and a plurality of lobes 14, 15, 16 extending from said central region said lobes being provided with lands 8 which cooperate in use of the clamp with respective elongate members.