Features Overall Heat Treatment: Made of alloy steel section, the drill bit undergoes overall heat treatment for high hardness and extended service life. Convenient Wood Chips Discharge: U-shaped long chip flute design allows for easy discharge of wood chips, enhancing drilling efficiency. Bursting Protection: The cutting edge force is on the same plane, providing effective protection against bursting, ensuring stable use. Compatible with Square Hole Drills: The circular design of the drill tail ensures stable clamping, suitable for use with square hole drills and square tenon machines. Versatile Woodworking Tool: Suitable for drilling various wood products including density board, medium fiber board, particle board, and wood. Specification: Item Type: Square Hole Mortiser Drill Bit Material: Bearing steel + alloy steel Uses: Suitable for wood products such as density board, medium fiber board, particle board, wood, etc. Suitable for square hole drills and square tenon machines Shank Type: Round shank Package List: Item Type: Square Hole Mortiser Drill Bit Material: Bearing steel + alloy steel Uses: Suitable for wood products such as density board, medium fiber board, particle board, wood, etc. Suitable for square hole drills and square tenon machines Shank Type: Round shank Note: Please bring protective gear when drilling to prevent the debris from splashing and hurting yourself. Package List 1 x Square Hole Mortiser Drill Bit 1 x Drill core