Key clamps are designed to secure and connect 48.3mmØ tubes quickly and easily. The wide range of options available enables users to create a huge variety of configurations including lighting grids studio frames staging and exhibitions stands. The 3 way 90° elbow key clamp is a 3 way corner joint providing a 90° angle to a top rail whilst connecting the post of a handrail. It is also used to create a smooth corner for other rail constructions.