Galvanized steel wood beam hanger uses a single toothed screw at the top of the hanger to prevent it from turning after installation. It owns a quot; lite oilquot; Bronze bearing and lockable spindle bolt for tight nut and accepts a 12mm bolt. It has a pendulum shackle that does not require a hook for chain connections, but is tamper resistant and requires an allen key with a special hole to open and close. Plate is 2 - 1/4" x 1 - 1/4". Holds up to 5,000 lbs. Quality: commercial.