Bought 2 of these, in the first I drilled at least 25 holes in galvanized steel but only on a 7/8 grid, in the second I drilled 2 1/2 holes in the photo. I will never spend money on it again.
Pros
A must have for DIYers and Professionals alike - ideal for DIY and light work such as drilling holes in plastic, aluminium, copper, iron and many other types of sheet metal (excluding steel or other harder metals).