Features Efficient 3-in-1 Set: This set includes a hex shank centering drill bit, inner hole opener, and countersunk hole opener, offering efficient and convenient usage for various drilling needs. Smooth Borderless Design: The borderless edge design of the hole saw ensures smooth cutting, quick chip removal, and enhanced drilling efficiency, saving time and effort. High-Quality Alloy Steel: Crafted from alloy steel, these hole openers exhibit high hardness, wear resistance, and excellent cutting performance, ensuring durability and effective perforation ability. Clean and Fast Cutting: The combination of alloy steel teeth and non-bonded edge design guarantees a smooth hole saw blade, delivering clean and fast cutting results for drilling tasks. Safe Automatic : The spring mechanism on the drill bit automatically pushes the disc out of the saw upon completion, ensuring safe and hassle- for the user. Features: 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 : 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