Instant Indicator Headspace and Bullet Comparator. Instant Indicator Designed specifically for shooters who are seeking the utmost in accuracy from their handloads. This instrument provides an extremely quick method for comparing bullets, seating depths, fired cases, sized cases, trim lengths and loaded ammunition for uniformity. Easily perform any of the following tasks: Sort bullets for uniformity, Sort cases fired in two or more rifles, sized cases for uniformity, Set up sizing die correctly, Compare sized cases to fired cases to determine the amount of headspace, Check uniformity of shoulder bump, Check bullet seating depth uniformity, Sort loaded ammunition for uniformity, Determine when cases need trimming, Check trim length uniformity. Supplied with one bore diameter bushing, surface contactor, shoulder contactor, headspace gauge and complete instructions.