Found it very helpful.Received timely and the product is fine. Product is as good as I expected.

I can’t say I was thrilled to find lead in my basement but it was pretty cool swabbing surfaces and seeing the swabs change color or not. Where there was lead the swabs changed right away. I also had some lead ingots laying around so I decided to record myself testing that, that really gave a strong reaction. I still have some left over I’m really pleased with this product. A good value.

Received timely and the product is fine. Exactly what I expected.

Muy bueno, recomendable 5 estrellas para el producto

After using the expensive swabs for years, I gave these a try. I work in occupational safety and have tested lead for many years. These work as expected and are a great budget option for my needs.