The G-Line by Gorvex 1" Heavy Duty Shackle Hasp 5509 can accommodate up to 4 locks. This ensures that the machinery that is being inspected or repaired can only be switched on once all 4 locks have been removed from the hasp. Made from heavy duty steel which resists tampering, this product is sturdy and long-lasting. It is also zinc plated which prevents rusting. The G-Line by Gorvex 1" Heavy Duty Shackle Hasp 5509 is an essential item in any environment which requires the use of large machinery.