Is it necessary to drill additional holes when installing hexagonal self-drilling screws?

When installing hexagonal self-drilling screws, it is generally not necessary to drill additional holes.

Because the head and tail of the hexagonal self-drilling screw are both hexagonal in shape, the head can be tightened with tools such as wrenches and torque wrenches, while the tail needs to be screwed into the wood or other materials with a screwdriver or electric screwdriver and can fit the surface.

If it is found during installation that the wood or other materials are too hard to directly screw in the hexagonal self-drilling screws, you can use a pre-drilling tool to pre-drill holes to make it easier to screw in the screws.