For ceiling and partitioning and clamping thin sheet. Lever action grid clamps temporarily connect ceiling grid and firmly hold levelling Line during the layout process.  Each Clamp is made from spring steel and is easy to operate with a single hand.  Rubber tips on the clamps hold the grid and levelling line firmly in place without damaging the grid finish. Spring steel lever action grid clamps hold the grid or levelling line firmly Rubber tips for strong grip on any surface without marking or scratching the finish Clamps hold the grid tightly