Two clamps per package. • Holds objects ½” to 4.5” (13 x 114 mm) • Mounting base 4.5” x 1.5” (114 x 38 mm) • Attaches with two ¼” (6 mm) bolts or #14 wood or sheet metal screws • One clamp supports a safe working load of 50 lbs. (23 kilos); two clamps support a safe working load of 100 lbs. The break strength of each clamp is 150 lbs. Made in the USA.