This a new offering and is made a bit different then the standard Soule. This sight has 40 minutes of windage each side of zero and enough elevation to go 1000 yards plus. The staff is thicker and the larger markings are extremely easy to read. This long base model is for firearms with hole spacings from 1.800"-2.2875" for Remington and Sharps rifles. Comes with two 10-28 screws. Will also fit Winchester rifles with proper tang screws. You can bet you won't be running out of windage with this sight on your rifle. ST12B3.5M LONG RANGE and ST12B2.5M MID RANGE MEGA SOULE SIGHTS The ST12B3.5M is a Soule type sight made specifically for long range shooting past 1000 yards, having 3.5 inches of vernier scale. The ST12B32.5M is a Soule type sight made for silhouette and long range shooting, having 2.5 inches of vernier scale. Both models share a number of common features, including: 1. an adjustable spring detent mechanism; 2. 41 minutes of windage to left and to the right for a total of 82 minutes windage; 3. windage and elevation adjustable to 1/1000 of an inch or 1/10th of a minute; 4. Hadley eyecup with 12 apertures and a rubber O ring to protect the stock; 5. Vernier scale on right and left sides of the stem.