Aluminum Road Stud - Road Safety Equipment Supplier - RoadSky. Feature: 1. Made of Aluminum Alloy material,the studs can bear capacity over 30 tons from vehicle tires. 2.Strong reflective light like diamonds at 350m far away making it safe for driving in poor visibility conditions. 3.Excellent anti-corrosion ability and heat-resist ability to make the road studs work under water, oil, grit and