A branch-off joint is formed between elongate members 1,2,3 such as cables by shrinking a sleeve 8 of heat-shrinkable material around the material. The material is held together between the cables 1,2,3 at the branch-off by clips 5,20,20',20'' having pairs of abutments which bear on the elongate members 1,2,3 to hold clips 5,20,20',20'' and members 1,2,3 in fixed relative positions. The abutments preferably have concave outermost surfaces, abutments of a pair extending in mutually opposed directions towards respective members 1,2,3. By use of two or more such clips 5,20,20',20'' in conjunction with three or more cables 1,2,3 the cables 1,2,3 and clips 5,20,20',20'' may be held in a coplanar arrangement, and the joint formed with low stress on the joint.
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