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 crossover key clamp creates a 90° cross over joint for two tubes. Often used in handrail/guardrail constructions the tubes are passed through each of the key clamps allowing horizontal tubes to be attached to a vertical tube.