Feature:1. DRILLING WOOD PRODUCTS: Suitable for drilling wood products such as density board, medium fiber board, particle board, wood and so on2. HIGH HARDNESS: The drill bit is made of alloy steel section, the overall heat treatment bring high hardness, and long service life3. IMPROVE DRILLING EFFICIENCY: U shaped long chip flute design is convenient for the discharge of wood chips and improves drilling efficiency4. AVOID BURSTING: The force of the cutting edge of the drill bit is on the same plane, and the effective protection can avoid the situation of bursting at the beginning of use5. MORE STABLE CLAMPING: The drill tail adopts a circular design, which makes the clamping more stable. Can be used with square hole drills and square tenon machinesSpecification:Item Type: Square Hole Mortiser Drill BitMaterial: Bearing steel + alloy steelUses: Suitable for wood products such as density board, medium fiber board, particle board, wood, etc.Suitable for square hole drills and square tenon machinesSquare Hole Size: Approx. 6.4mm / 0.25in8mm / 0.31in9.5mm / 0.37in12.7mm / 0.5in14mm / 0.55in16mm / 0.63inShank Type: Round shank.Package List:6 x Square Hole Mortiser Drill BitNote:Please bring protective gear when drilling to prevent the debris from splashing and hurting yourself.