To have a faster on-target time with your defensive or competition handguns, getting the right kind of sights on your slide is paramount. These Trijicon Fiber Sight Sets are designed to work with most of today's SIG Sauer-style sight dovetails. They provide a fast, durable and easily seen sighting system that aids shooters in getting on target quickly in any self-defense situation. Each Trijicon Fiber Sight Set is precisely cut to fit the dovetails found on pistol slides made by SIG Sauer, as well as other handguns that use SIG-style sight dovetails. These iron sights bring the same level of toughness and durability found in the company's other sighting systems to the world of fiber-optic sights. The thin front-sight blade allows for increased speed and accuracy and feature a bright-red front sight that easily catches ambient light for a bright focus point. The Trijicon Fiber Sight Set includes a rear U-notch that measures 0.125 inch wide and sits 0.307 inch above the slide. The front-sight blade width measures 0.110-inch and the front sight sits 0.138 inch above the slide. Trijicon recommends that professional gunsmiths install these sights to ensure proper sighting and retention.