Works with #4 ~ #20 size flies. Good with 2x ~ 7x tippet. Magnetic fly catcher holds other flies. Stainless steel needle. Made of A5052 anodized aluminum. Made in Japan. Introducing Bull's Eye - the ultimate solution for tippet threading on small flies. Our threader is designed with precision to make your fly-fishing experience hassle-free. Our tippet threader is designed to work with flies ranging from #4 to #20 in size (2 slotted Pro model works down to size #30) and is compatible with 2x to 7x tippet. It comes equipped with a stainless steel needle, ensuring long-lasting durability and reliability. Bull's Eye features a magnetic fly catcher that holds other flies, keeping them safe and secure. It is made of high-quality A5052 anodized aluminum, ensuring its sturdiness and resistance to corrosion. Our product is made in Japan, ensuring exceptional quality and craftsmanship.