Accurate drilling is possible in most types of wood, fiberglass, PVC (polyvinyl chloride) and soft metals such as aluminum. Can also be used to drill smooth, clean, perfectly contoured holes in soft, close-grained woods, particle boards and floors. Specially designed for hinges, woodworking holes, and plastic products. Suitable for industrial hinge installation, woodworking and repair, model making, spherical door tip, drawer tip installation, etc.The drill bit adopts a thorn cutting design, which greatly reduces the occurrence of hole wall chipping. The fluted cutting edge cuts the wood instead of scraping it away, reducing heat build-up and keeping the cutting edge sharper longer. Self-centering tips allow for precise actuation and the bit expels material as it cuts. Good choice for hole cutters. Two-position prongs line the hole prior to chipping, providing a cleaner hole inside and reducing vibration. Precision ground hex shank prevents rotation in the drill chuck or bit extension. The positioning is accurate, the drill bit engages the wood before the flat drill touches the wood, and the drilled hole is also very round.