12" long brad point bit set (7 drill bit set). perfect for drilling wood, plastic, drywall and composite materials fulton if you have drilled a piece of wood and came up short or had to somehow line it up from the other side and attempt to correctly drill, then this drill bit set is for you. each bit in the set is approximately 12" long and they are made from high speed steel. typically brad point drill bits are perfect for drilling wood, plastic and some composite materials. brad points have a sharp point on the tip, which prevents the bit from "walking" like standard twist bits tend to do especially in harder woods. this is why woodworkers love to use brad point drill bits in most all of there projects.brad point drill bits don't move from the original contact point which tends to produce much more accurate and cleaner results. the extra long brad point drill bit set comes with the following diameter drill bits: 1/8", 3/16", 1/4", 5/16", 3/8", 7/16" and 1/2". each bit is engraved with the size for easy identification.