✔️ Heavy Duty: Each 4 inch spring snap here weighs 4.2 ounces, HEAVIER and LARGER than other similar products on the market. 4 inch carabiner clips from SHONAN are sturdy and durable..✔️ HIGH QUALITY MATERIAL: The SHONAN carabiners are made of premium quality stainless steel 304, which gives the heavy-duty carabiners rustproof, and corrosion-resistant properties. All the SHONAN stainless steel carabiner clips are polished after they are cast. The heavy-duty carabiners here don’t stain..✔️ Multi-Applications: The maximum working capacity for stainless steel carabiner(SSBS-003) is 400 pounds. They are perfect for boating and heavy-duty use. You can also attach the carabiner clip to any chains, ropes, home gym equipment, or any other lifting machine easily..✔️ Specific Dimensions: The overall length of the heavy-duty clips here is 4 inches. The overall width is 1.97 inches. The opening is 0.56 inches. Please check the picture with more size details in the description or the images gallery..✔️ SATISFACTION GUARANTEE: This package comes with TWO pieces of stainless steel spring snaps, and the snaps come with a one-year satisfaction guarantee. Please contact us with any questions or issues that you may have. We will be more than happy to assist you.