Initial custom-made left-thread screws especially developed making to be used on off road and truggy hands (the paid off shock mounts) to get rid of the screws from switching reduced as a result of vibration. Become utilized simply on REMAINING BACK supply and RIGHT FRONT supply. The left-thread screws are constructed of comparable top-notch metal as standard right-thread screws. For effortless recognition these screws have actually in fact in fact really a silver layer.