Item Type: Square Hole Mortiser Drill Bit <br>Material: Bearing steel + alloy steel <br>Uses: <br>Suitable for wood products such as density board, medium fiber board, particle board, wood, etc. <br>Suitable for square hole drills and square tenon machines <br>Square Hole Size: Approx. 6.4mm / 0.25in <br>8mm / 0.31in <br>9.5mm / 0.37in <br>12.7mm / 0.5in <br>14mm / 0.55in <br>16mm / 0.63in <br>Shank Type: Round shank<br>1、DRILLING WOOD PRODUCTS: Suitable for drilling wood products such as density board, medium fiber board, particle board, wood and so on <br>2、HIGH HARDNESS: The drill bit is made of alloy steel section, the overall heat treatment bring high hardness, and long service life <br>3、IMPROVE DRILLING EFFICIENCY: U shaped long chip flute design is convenient for the discharge of wood chips and improves drilling efficiency <br>4、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 use <br>5、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 machinesPlease bring protective gear when drilling to prevent the debris from splashing and hurting yourself.6 x Square Hole Mortiser Drill Bit