Before you start drilling, make sure you have eye protection to stop any metal shrapnel or sparks. The slivers of steel the drill can toss up are sharp and could cause damage to your eyes. Consider wearing a long-sleeved shirt and closed-toe shoes before working with metal. Find the divot you created on the steel and place the drill bit in it. Make sure you hold your drill straight so you don’t make a crooked hole in the steel. Use a low RPM setting and keep a steady pressure as you push the bit through the metal. Start and stop drilling often to give the steel a chance to cool down and lubricate the area. Drilling at a faster speed could damage the steel or the drill.  Use light, but steady pressure when drilling smaller holes so you don’t break your drill bit. If you’re working with a softer steel, stay consistent at a medium speed so the metal shavings don’t melt. Keep all your clothing away from the drill bit so it doesn’t get caught. Keep a firm grip on the drill, but ease off a bit of the pressure. Squeeze the trigger on the drill in short bursts until the bit goes through the other side. Keep the drill bit spinning while you pull it out from the hole. The drill may catch on the steel and try to spin in your hands. Keep your face away from the drill in case this happens.
Wear safety glasses while working with metal. Hold the drill perpendicular to the piece of steel so the tip is in the divot. Drill slowly and apply firm downward pressure. Pulse the drill when you’re close to breaking through the other side.