<b>Material:</b> metal<br><br> <b>Color:</b> red, blue and black available <br><br><b>Installation:</b> Use a screwdriver of the right size, being careful not to tighten the screws, just a good tight fit is good enough <br><br><b>Durable and accurate: </b>the D-rings are very durable, much stiffer and more accurate than nylon rings, perfect for wristband release <br><br><b>Package contents:</b> 3 D-ring, 3 screwdriver