The 3 Way Clamp is another ingenious Kupo innovation. This all metal cast aluminum clamp features a unique spring locking mechanism that allows you to instantly latch and release the locking collar around any tubing sized from 1.0 Ð 1.4" (25 Ð 35mm) in diameter. Just a quick turn of the tension handle to secure it in place and your ready to mount any light fixture or accessory up to 66 lbs (30 Kg) to light stands, scaffolds or Kupoles in a snap! The 3 Way Clamp has three recessed mounting locations distributed in 90 degree increments in to accept a series of interchangeable accessories.