The thickness of the NOKIN solar road stud light is only 11mm, this solar road stud maker can be used for sharp corners, dangerous curves, concrete traffic islands, barriers, bike lanes, speed bumps, merging lanes, traffic circles, guardrails, narrow bridge "keep clear" intersections, and much more. #roadstud #solarroadstud #roadsafety #nokinroadstud #nkroadstud #roadstudmarker