
HRC 48-50 STEEL: Made of special steel with heat treatment, these drill bits have a high hardness of HRC 48-50, an elongated core and high concentricity for long-lasting use. 6 SLOTS DIAMETER: With 6 pieces per pack, these saw bits have different diameters of 1/4 inch (6.4 mm), 5/16 inch (8 mm), 3/8 inch (9.5 mm), 1/2 inch (12.7 mm). , 9/16 inch (14 mm) and 5/8 inch (16 mm) for using with drills, hammers and other tools. WIDE APPLICABILITY: They are great accessories for mortising, chiseling and woodworking, suitable for construction, installation, renovation, decoration industry, etc. < p>Product Description Set of 6 Square Hole Drill Bits, Steel Hollow Chisel Carpentry Tool Set Professional drill bit, suitable for construction, installation, renovation, decoration industry, etc.< /p> 6 pieces per pack with different slot diameters to meet your needs. Slot Diameter/Weight: 1/4 inch (6.4 mm) / 106 g 5/16 inch (8 mm) / 131 g 3/8 inch (9.5 mm) / 154 g > 1/2 inch (12.7 mm) / 195 g 9/16