Features Overall Heat Treatment: Made of alloy steel, undergoes overall heat treatment for high hardness and extended service life. Convenient Wood Chips Discharge: U-shaped long chip flute design for efficient wood chips discharge, enhancing drilling efficiency. Bursting Protection: Cutting edge force on the same plane for effective protection, avoiding bursting, ensuring stability during use. Compatible with Square Hole Drills: Circular design drill tail for 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, and particle board. 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