Features: Engineered with vacuum brazing technology and premium HD90 abrasive, this 12 piece hole saw set delivers 10x longer life and 30% faster drilling efficiency for professional durability and performances. Features full coverage cooling wax on 6-16mm models to reduce heat by 20% and lightweight 700g design for fatigue less operations during extended projects. Designed for engineers, contractors, and DIYer enthusiasts requiring precise cutting across materials like tile, glass, and masonry in construction or renovation tasks. Perfect for high intensity job site and home workshops, combining construction with ergonomic safety edges to minimize injury risks during repetitive drilling applications. The rounded edged safety design ensures secure handling for both novice users and seasoned professionals tackling demanding projects in tight spaces or elevated work environments. Specifications: Size: hole opener ranging 6-35mm Package Includes: 1 Set Hole Cutter note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind befores you order. 2.Due to the differences between different monitors, the picture may not reflect the actual color. Thanks for your understandings.