Parts List: 6 x Square Hole Drill Bit Highlight description: [Dimensions] The dimensions of these drill bits include: 1/4 inch (6.4 mm), 5/16 inch (8 mm), 3/8 inch (9.5 mm), 1/2 inch (12.7 mm), 7/16 inch (11 mm), 9/16 inch (14 mm). [Material] Crafted from high-speed steel (HRC48~50), these bits are designed to withstand rigorous use and maintain their sharpness. The heat treatment process ensures sturdy construction and resilience, making them a reliable addition to your woodworking arsenal. [Compatibility] These drill bits are compatible with all tenon heads and drill accessories. [Double Effect] These drill bits can be paired with mortising machines to achieve double effect. [Improved Working Efficiency] They are ideal for use in the construction, installation, decoration, and renovation industries, significantly reducing the workload for workers and increasing the speed of work. By using these bits, you can enjoy improved efficiency, reduced labor costs, and a higher overall output. Detailed description: Description: Whether you're a professional woodworker or an enthusiastic DIYer, these bits are sure to become an indispensable part of your toolbox to meet your needs. It is a must-have tool for any woodworker or carpenter who values precision and efficiency. Key Features: High Speed Steel Construction: These drill bits are made from high speed steel and processed with heat treatment to withstand the rigors of repetitive use. This ensures that the drill bit remains compatible with sharp and effective, even after prolonged use. Maximum Efficiency and Reduced Costs: This premium square hole mortising drill bit is a useful tool that elevates the efficiency of mortising tasks while reducing processing costs, making it a highly valuable addition to construction industry. Specifications: Product Name: Square Hole Drill Bits Material: High Speed Steel Color: Silver Size: 6.4 mm;8 mm;9.5 mm;12.7 mm;11 mm;14 mm Quantity: 6Pcs Notes: 1.There may be slight differences between the picture and the actual color of the commodity. We will try our best to show you the exact color. 2.Please allow slight dimension difference due to manual measurement. [Dimensions] The dimensions of these drill bits include: 1/4 inch (6.4 mm), 5/16 inch (8 mm), 3/8 inch (9.5 mm), 1/2 inch (12.7 mm), 7/16 inch (11 mm), 9/16 inch (14 mm). [Material] Crafted from high-speed steel (HRC48~50), these bits are designed to withstand rigorous use and maintain their sharpness. The heat treatment process ensures sturdy construction and resilience, making them a reliable addition to your woodworking arsenal. [Compatibility] These drill bits are compatible with all tenon heads and drill accessories. [Double Effect] These drill bits can be paired with mortising machines to achieve double effect. [Improved Working Efficiency] They are ideal for use in the construction, installation, decoration, and renovation industries, significantly reducing the workload for workers and increasing the speed of work. By using these bits, you can enjoy improved efficiency, reduced labor costs, and a higher overall output.