Elumen8 CLAM256 Inline Internal Joint Black Key Clamp (150-BPC). 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 inline internal sleeve key clamp provides a secure joint when connecting two tubes of the same diameter with a max. wall thickness of 3.2mm. Malleable cast iron construction hot dip galvanised with black powder coated finish Designed to fit 48.3mmØ tubes Simply secured via an Allen key (not included) Please note: Not suitable for use in the construction of scaffolding frameworks Grub screws included For use with 3.2mm max. tube wall thickness