Features Included Tools For Efficiency: This set features a hex shank centering drill bit, inner hole opener, and countersunk hole opener to streamline your drilling tasks Borderl Edge Design: The unique borderl edge design ensures smoother cuts and quick chip removal, significantly enhancing your drilling efficiency Durable Alloy Steel Construction: Crafted from high-hardness alloy steel, these hole openers offer exceptional wear resistance and excellent cutting performance for long-lasting use Smooth And Fast Cutting: The combination of alloy steel teeth with a non-bonded edge design guarantees clean cuts and efficient hole-making for various applications Enhanced Safety Mechanism: The spring-loaded drill bit automatically ejects the disc from the saw once the hole is drilled, ensuring a safer operating experience Features: 1、INCLUDED TOOLS: Including hex shank centering drill bit, inner hole opener and countersunk hole opener, used together, efficient and convenient. 2、BORDERL DESIGN: With borderl 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 hardn, 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 : 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 Opener Material: Alloy Steel Color: Green, Black Application: Suitable for gypsum board, wood board and other thin wood board Package List: 1 x Positioning Center Drill Bit 1 x Inner Hole Opener 1 x Countersunk Hole Opener Package List 1 x Positioning Center Drill Bit 1 x Inner Hole Opener 1 x Countersunk Hole Opener