The Reins TG Drop Shot Sinker Slim features a design that makes it easier to pull thru rocks, weeds, or brush with fewer hang ups. These sinkers are made with 95% tungsten and 5% nickel alloy. Each sinker has a specific gravity of 18.2. This makes them 1.8 times as dense as lead and environmentally safe. The tungsten material is dense and allows you to feel every pebble along the bottom. This makes it easier to tell a strike from a nibble.