The Performance Tool W5251 Threaded Rivet Kit is the versatile fastening solution you need for thin materials like sheet metal, plastic, and fiberglass. With this kit, you can easily set threaded rivets into these materials, creating permanent and reliable fastening even in hard-to-reach locations. The kit also includes threaded nuts that can be easily installed when only one side of the material is accessible. With 30 pieces of the following SAE sizes included: 6-32, 8-32, 10-24, and 1/4-20, you'll have the right size for any job. And with the convenient plastic case and dividers included, storage and quick size identification are a breeze.