The Scrim Clamp allows you to attach the top of a tripod scrim securely and safely to the upright pole of any tripod stand. The Scrim Clamp eliminates the need for zip-ties or other less than optimum attachment methods for a clean, secure, professional look. Made of high impact plastic, steel hinge pins, and steel tension bolt. The Scrim Clamp hinges open to allow attachment or removal from a tripod upright pole at any time. The clamp fits any tripod stand from 1 3/8 in. up to 1 1/2 in. (35-38 mm) in diameter. The clamp hook allows any tripod scrim with a top loop to be attached in seconds.