Red Dot Kit #1 Diamond Cut Glass Red Dots with Chrome Bezels. Can't find a set of ready made red dot lenses for your favorite ride? Build your own! These are the real diamond cut glass blue dots. These have the long chrome rims. The legs are about 5/16" long. The hole will need to be about 7/8. A little bead of clear silicone, twist the tabs and you're stylin'.