Durable: Made of professional grade high-speed steel, ensuring improved tooth heat resistance; Our smooth black paint surface ensures excellent rust prevention and wear resistance, extending the service life of drilling projects by over 50%. Widely used: with ultra sharp serration treatment, it is very suitable for cork, aluminum, plastic boards, gypsum boards, thin PVC boards, composite materials, etc. Quick Clean Cut: Use faster and cleaner cuts. From small diameter to large diameter, it can greatly improve work efficiency. Portable Storage Box: The set comes with a custom box for easy carrying, and each item has a dedicated slot for easy access.