Reversible beam clamps with 3/4" jaw opening and 1/4-20 threaded holes are used when 1/4-20 drop rod length needs to be adjusted to accommodate the field installation finished height. Garvin industries’ through hole style in their beam clamps allow drop rod length adjustment. Their hardened cup point set screws come with jam nuts to prevent vibratory loosening in industrial settings. Additionally, clamps come in both short and wide jaw openings for various beam flange thickness.