u00b0 from about 180 u00b0 to about 95 u00b0 from about 180 u00b0 to about 80 u00b0 preferably from about 180 u00b0 to about 90 u00b0 more preferably from about 180 u00b0 to about 75 u00b0 whereas the field side end of the bracket may rotate about 45 u00b0 or less about 40 u00b0 to about 35 u00b0 about 40 u00b0 to about 30 u00b0 or vice versa an embodiment of a hinge that may be used in embodiments of the invention is shown in fig4 the hinge comprises a pin not shown and two halves a male half 410 and a female half 430 when assembled a pin not shown is inserted in a hole 440 in the female half 430 and through the hole 420 in the male half 410 connecting the two pieces of the hinge referring now to fig5 6 and 7 the rotation of the parts of an exemplary rail clip as disclosed herein is depicted a side view of an embodiment of a rail clip 540 with the field side of the bracket on the left and the gage side of the bracket on the right as described herein is shown in fig5 for convenience the rail clip is described as shown in fig5 with the field side on the left and the gage side on the right but the mirror image not shown would apply to the second rail with the gage side of the bracket on the left and the field side of the bracket on the right the rail clip 540 shown in fig5 comprises a j shaped bracket 550 connected to a reverse c shaped.