Features Included Tools For Convenience: This set features a hex shank centering drill bit, inner hole opener, and countersunk hole opener, providing everything you need for efficient drilling Borderl Edge Design: The unique borderl edge design allows for smoother cutting and quick chip removal, significantly enhancing your drilling efficiency for various projects Durable Alloy Steel Construction: Made from high-quality alloy steel, these hole openers offer exceptional hardness and wear resistance, ensuring longevity and outstanding cutting performance Efficient Cutting Performance: The combination of alloy steel teeth and a non-bonded edge design delivers a smooth cutting experience, resulting in clean, fast holes every time Enhanced Safety Features: The integrated spring mechanism automatically ejects the disc after cutting, providing a safe operation and minimizing the risk of accidents during use 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