Please note: the physical slightly color difference or difference, does not affect the use, please do not mind, thank you! Quality Material: These square hole drill bits and wood mortising chisel set are crafted with high-speed steel, ensuring durability and . The HRC48-50 hardness guarantees their ability to withstand heavy-duty woodworking tasks. Versatile Woodworking Application: Designed specifically for woodworking, these square hole drill bits and chisels are perfect for creating precise square holes in wooden materials. Whether you're working on furniture, cabinets, or other woodworking projects, these tools provide the accuracy and efficiency needed to achieve clean and professional results. Enhanced Precision and Finishing: When using these drill bits, you can achieve tidy square holes. However, for the finer details, it is recommended to chisel by hand. This additional step ensures that the square holes have a polished and refined , enhancing the overall quality of your woodworking projects. The combination of drilling and chiseling allows for greater precision and control over the final result. Heat Management for Prolonged Use: To prevent overheating and potential damage to the drill bits, it is advised to use cutting fluid during usage. This fluid helps to keep the bits cool, even during fast rotary friction. By maintaining a lower temperature, the drill bits can be used for longer periods without compromising their performance. This feature is especially beneficial for those working on extensive woodworking projects. color: Photo Color Material: Bearing steel Package Contents: 8pcs Woodworking Square Hole Drill Bit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.