Partially Drive Screw

What happens here

Begin by positioning a wood screw into the desired fastening point on the wooden railing. Using a cordless drill (an impact driver is shown), carefully drive the screw into the wood. The goal in this initial phase is to embed the screw deeply enough so that its head is very close to, but not quite flush with, the surface of the wood. This step creates the primary engagement of the screw with the material.

Goal: Embed the screw almost flush into the wood.