Sam is made from tungsten carbide steel, coated in titanium for longevity and stability. This nail drill bit is 3/32" and, it's heavy weight is perfect for around the cuticle area, for a flushed nail enhancement. The titanium coating needs some tender loving care, so no wire brushes! Paired perfectly with our eco soft brush, it will clean your nail drill bits to perfection. Remember, treat your tools like jewels. The best bit is, the more you look after them, the less you have to buy and throw away = less in landfill. Everyone is happy!