MATERIAL:Our toggle latch clamps are made of carbon steel, durable and sturdy. And galvanized coating makes it anti-rust,anti-corrosion and waterproof. ADVANTAGES: This latch action toggle clamp is adjustable. Just simply turn the adjustment lever so that you can make it tight or loose. Adjustable distance2.6 inch- 3.3 inch. Holding Capacity: 660Lbs. With lock hole. EASILY INSTALLED: Convenient to install. Just fix the toggle clamp and the hook, and then turn the adjustment lever to adjust a proper distance. MUTIPLEPURPOSEThis lockable heavy duty toggle latch clamp can be used in many situations. Such as locking doors, cabinet doors, storage boxes, tool boxes, cases, smoker lid, making jigs, tool fixtures , and etc. PACKAGE2 packs included. If theres any problem, please feel free to contact us, we will give you a replacement or your money back within 30 days