The maximum working capacity of spring hook is 400 lbs, they are perfect for boating and heavy-duty use. You can also attach the carabiner to any chains, ropes, home gym equipment, or any other lifting machine easily, spring snap hook are made of premium quality stainless steel 304, which gives the heavy-duty spring snap hook rustproof, and corrosion-resistant properties. 2 Pcs : Length: 4 inch, Width: 2 inch, Hook thickness (wire diameter): 0.4 inch, Inside diameter of wide side: 1.2 inch, Inside diameter of narrow side: 0.6 inch, Snap opening: 0.56 inch. Application Weight: Its limit load capacity is 400Lbs, spring hooks is made of 304 stainless steel, Anti-rust, to reliability, for connection and disconnect of ropes, chains. Easy Installation:The snap hook is simple application, spring opening opens and closes simple, quick connect/disconnect for binding, rigging anchoring hardware. Widely Used in Outdoor Indoor: Our snap hooks for key ring, chains, ropes, camping, boating, sailing, camping, pet, It can be used for widely purposes. Satisfactory Shopping: For these Spring Snap Hook is carefully selected and checked. we are deeply committed to providing a superior shopping experience to our customers.