Designed by Chuck Warner of Warner Precision. This jig is designed to allow you to use your existing sear or a new flat sear and turn it into a TR Sear. The radius sear nose will help in producing a roll trigger. There are 4 different segments of different lengths to allow you to use almost any sear you like. When using the jig the numbers will be on the same side, not opposing. The second hole for the sear pin ensures the jig is aligned as it should be.