This Super Clamp that has thousands of uses. No camera bag should be without one. The Super Clamp holds everything: cameras, lights, umbrellas, hooks, shelves, plate glass, bars, even other Super Clamps! And they hold these items to everything: poles, posts, tripod legs, pipes, doors, stands, and - virtually any support you can get the Super Clamps wide jaws around. Attachment:16mm hexagonal and M5and 1 or 4Inch threads attachment type Clamp Range - Max.(Round Tube):2.17 in Clamp Range Min Round Tube:0.51 in Load Capacity:33.07 lbs Weight:0.9 lb Colour:Black Material:Metal Package Contents: 1 x Big Super Clamp Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm.