The LockOn T-1 5/16 optic sight in target is well suited for higher powered optics, 9x to 24x plus. Set up range starting at 50 yards to 250 yards plus.The T-1 5/16 is a 12" by 12" target with 1" by 1" grid. 10 PackFeaturesSingle Point of Aim Designed Specifically for Higher Powered Optics Innovative Cutting-Edge Design helps Increase AccuracyAny Sight / Any Distance How-To Use:The visual contrast of the patented design helps the marksman dissect the target into quadrants. The marksman's focus is on the horizontal and vertical yellow cross that's bordered by the double red chisel design at the target center axis while being drawn into center by the four red diagonal wedges. This makes the hand eye coordination process easier, faster and more effective.