If you climb in older areas where pitons were used, these heavily tapered nuts are amazing. Sometimes they fit perfectly in shallow flares where most other stoppers would barely hold body weight. Their shape is amazing for almost any rock type. With only five sizes they won't be the only set of nuts on your rack, but they are very useful nonetheless.
These nuts, while expensive, are the most versatile nut on the market. This is a must-have for aid climbers. If you are a cam junky and only place a nut where a cam absolutely won't fit, more often than not you'll find yourself reaching for Offset Nuts. All in all an excellent nut; bomber in many places where most other nuts don't come close. If you want something for the really tiny placements, check out the DMM Brass Offsets. If you don't want an offset shape, consider the classic design of the Black Diamond Stopper or the featherweight Wild Country Superlight Rocks.