Strong arm brackets provide a very rigid installation with plastic elbow swivels 360° to work with tubing coming from any direction. Pex bend lock blocks are pre-assembled on each pair of brackets. Position stub outs at any desired location within the stud bay. Twisted brackets mount to face of stud and l-bent brackets mount inside stud cavity. When screws on blocks are tightened, blocks compress on tube, brackets and elbow eliminating all movement.