The Avenger C261B Eye Clamp is made from extremely high quality material resulting in exceptional ergonomics and performance. The Black Eye Clamp from Lastolite features an incredible carrying capacity of 440 pounds, with extremely secure locking mechanisms. These Lastolite clamps are a very useful Lastolite lighting accessory since they require no tools to use, and can be secured on a truss or pipe with one hand. The C261B is the basic version of eye clamp with an M10-M12 threading. Be sure to see the full line of photo and lighting accessories for all your photography needs.