The Firehole Stones Tear Drop Body is a through-hole tungsten body which envelops the hook shank, unlike other weights which sit on top of the hook. The body slides onto a hook just like a slotted bead. The shape is designed to heavily weight the fly in the general thorax position of your fly and then quickly tapers for a body transition. The shape and method of attachment are both designed to center the weight on the hook and create a realistic fly profile. Tear Drop Bodies are available in raw, unfinished tungsten that Firehole Outdoors calls Birthday Suit, in a range of sizes. 28 pieces per package. Here is a full description of Firehole's Weight Management System.