Item Type: Square Hole Drill Bits Material: Bearing steel Model: 6mm/6.4mm/8mm/9.5mm Application: suitable for wood products such as MDF, MDF, particle board, wood, etc., suitable for Square hole drills, Square tenon machines SpecificationSquare hole sizeShank diameterGrooving depthTotal lengthweight 6mm(Approx.)6mm / 0.2in4mm / 0.2in45mm / 1.8in175mm / 6.9in120 g / 4.2 oz 6.4mm(Approx.)6.4mm / 0.3in4mm / 0.2in45mm / 1.8in175mm / 6.9in120 g / 4.2 oz 8mm(Approx.)8mm / 0.3in5.5mm / 0.2in60mm / 2.4in195mm / 7.7in160 g / 5.6 oz 9.5mm(Approx.)9.5mm / 0.4in6.5mm / 0.3in60mm / 2.4in195mm / 7.7in170 g / 6 oz1The drill bit is forged with bearing steel, the overall heat treatment hardness is high, and the service life is long. 2U?long chip flute designed is convenient for the discharge of wood chips and improves drilling efficiency. 3The force of the cutting edge of the drill bit is on a plane, which effectively protects against bursting at the beginning of use. 4Universal shank type, the drill tail adopts a circular designed, which makes the clamping more stable. 5Small size, easy to carry and store, convenient to use and with good performance. 1 x 6mmSquare Hole Drill Bits 1 x 6.4mmSquare Hole Drill Bits 1 x 8mmSquare Hole Drill Bits 1 x 9.5mmSquare Hole Drill Bits