Permanent Rapid Steel Substancemail: Produced from premium rapid steel for extraordinary wear resistance and effect strength, ensuring permanent execution even under heavy use Flexible 5PC Sand: Includes five different measurements of step exercises to handle various hole diameter demands, excellent for home repairs, undertakings, and professional applications Accuracy Royal Scaling: Developed to royal criteria for accurate agreement with royal equipment and parts, ensuring drilling for professional craftsmen Efficient Cutting Executparticlemail: Four drill plan enhances drilling efficiency, reducing cutting resistance for polisher action, ideal for rapid multiple hole tasks in metal, aluminum, wood, and polystyrene Accessible Storage Casemail: Arrives with a permanent polystyrene storage case for easy portability and security, making it ideal for technicians and hobbyists on proceed, Manufacturer: RGYBAO