You can use the spiral drill in 3.3 mm thickness to pre-drill for the recommended pop rivets. It is recommended to pre-drill with an exact diameter so that the recommended rivets can be easily fixed in the bead of the gutter. Thanks to the 130-degree tip angle, you cut into metal types of steel with ease. Great for drilling in cast iron and stainless steel. This drill has a diameter of 3.3 mm.
