Feature:... Three integrated thread sizes allow you to attach the mount to stands or booms with 38-16, 58-27, or 516-18 threads.; A cable securing mechanism prevents the transmission of mechanical noise through the cable and connector.; Locking, pivoting design provides maximum aiming capabilities. ...more Editorial Reviews ... Product Description | The A89SM shock mount reduces mechanical noise transmission by more than 20 decibels. Â Designed for the Shure SM89 shotgun microphone , it also fits any 3/4 inch diameter microphone. Â ...more