As others have said, this is a JumpingDolphin brand. There are no instructions on the packaging. I even received some in the WRONG packaging (listed as 6" when clearly 4"). Poor quality control; Most were rusty to begin with. Looks like they were repackaged after someone cleaned out the garage. For the price if sold as used or returned they would be close to being acceptable. I would return them if I didn't need them right away.