The New ELDX – Deep Drilling Eye Lag Screw is designed to go into structural steel up to 1/4" thick, NOT FOR USE IN SHEET METAL THINNER THAN 12 GAUGE (0.1094"). The ELDX has a blue Ruspert® finish with an extra wide drill tip. It can drill into 1/8? steel in less than 5 seconds, and is the only screw of its kind on the market.