Feature:1. INCLUDED TOOLS: Including hex shank centering drill bit, inner hole opener and countersunk hole opener, used together, efficient and convenient.2. BORDERLESS DESIGN: With borderless edge design, this hole saw cuts more smoothly, with quick chip removal, and greatly improves drilling efficiency.3. ALLOY STEEL: These hole openers are made of alloy steel, with high hardness, wear resistance, good cutting performance and perforation ability.4. EFFICIENT CUTTING: The combination of alloy steel teeth and non bonded edge design ensures smooth hole saw blade, ensuring clean and fast cutting.5. SAFE OPERATION: The spring on the drill bit will automatically push the disc out of the saw as soon as the hole is completed, which is safe to operate.Specification:Item Type: Spotlight Hole OpenerMaterial: Alloy SteelColor: Green, BlackApplication: Suitable for gypsum board, wood board and other thin wood board.Package List:1 x Positioning Center Drill Bit1 x Inner Hole Opener1 x Countersunk Hole Opener