The BFT Tungsten Fastach Sinker is made of 100% natural tungsten! This material has a higher density than lead, which means the sinker is smaller for the same weight. It’s a perfect way to change the weight of your shallow rig, simply attach it and remove it just as quickly! Perfect for situations where you want to increase the weight of your rig, with the Fastach clip adding weight to your lure is a snap!