Sun Optics USA 1" High Profile See-thru Sport Rings New!Sun optics USA 1" High Profile See-thru Sport Ring represents the very finest in a aircraft grade aluminum extruded ring. These remarkably consistent feature a full wrap around cap design that will not collapse your scope tube. Four Large t15 torx head screws provide superior scope retention. Square cross bolt coupled with a 1/2" knurled screwdriver slotted thumb nut provides a rock solid no movement fit between ring and rail. Can be quickly attached and detached with return to zero.