Drill bits for wood are the most commonly available sets, coming in several different materials. High speed steel bits, for example, are great for general use if you need something that can also handle plastics or light metals. Steel or tungsten carbide brad point bits, on the other hand, are geared specifically for woods. Their unique W-point tip starts a smaller hole as it drills to anchor the bit down until it reaches the wider cutting area. Small rubber rings called depth stops come with many kits to make it easy to get accurate hole depths with a simple visual guide.