Features Versatile Application: Ideal for various wood products like density board, medium fiber board, and particleboard, ensuring adaptability for all your woodworking projects Superior Durability: Crafted from high-quality alloy steel with heat treatment, this drill bit boasts exceptional hardness and extended service life for long-term use Enhanced Efficiency: The U-shaped long chip removal slot design allows for quick wood chip discharge, significantly improving drilling speed and overall performance Burst-Resistant Design: Featuring a unique drill sleeve design that distributes stress evenly, this tool effectively minimizes the risk of bursting during initial use Stable Clamping System: Equipped with a round drill shank for secure clamping, making it compatible with square hole drilling machines and tenon machines for reliable operation Features: 1、Multi Purpose: This mortise chisel drill bit is suitable for wood products such as density board, medium fiber board, particleboard, wood, etc. 2、Alloy Drill Bit: The drill bit is made of alloy steel, with overall heat treatment, has high hardness and long service life. 3、Long Chip Removal Slot: U long chip discharge slot design facilitates wood chip discharge, improve drilling efficiency. 4、Drill Sleeve Design: The stress of the drill sleeve flute is in a plane, which can effectively prevent from bursting at the beginning of use. 5、Universal Shank: Adopt round drill shank, which makes the clamping more stable, suitable for square hole drilling machine, square tenon machine. Specification: Item Type: Square Hole Drill Bit Material: Bearing Steel Drill Bit Diameter: Approx. 6.4mm / 1/4in Usage: Suitable for wood products such as density board, medium fiber board, particleboard, wood, etc., work with square hole drilling machine, square tenon machine Package List: 1 x Square Hole Drill Bit Package List 1 x Square Hole Drill Bit