Review on 🔩 100 Count of Extra Heavy Duty Zinc Plated Steel Picture Hangers - 10 LB Capacity with Nails (Pack of 100 Sets) by Jessica Lewis

As others have said, the diameter of the nail is slightly larger than the hanger hook hole. You can definitely drive a nail in with enough force, but the problem is that it defeats the purpose of the hangers - to achieve precise placement of the picture. You can mark the spot on the wall beforehand, but since the nail won't stick out of the hook without a hammer, blindly stick the nail and hook into the wall. Incredibly frustrating which makes the product pointless.