Description Features: Single cutting edge and single spur (ensuring clean hole edges) Self-feeding – the thread at the end of the drill bit automatically grips into the workpiece and moves deeper without additional pressure Carbon Steel – keeps the edge long and easy to sharpen Suitable for use with electric drill Specifications: ⌀ Length Spiral Length Shaft 3 mm 150 mm 100 mm 2.8 mm 4 mm 180 mm 130 mm 3.8 mm 6 mm 210 mm 150 mm 5.7 mm 8 mm 225 mm 165 mm 7 mm 10 mm 250 mm 190 mm 7 mm 12 mm 270 mm 195 mm 10 mm 14 mm 290 mm 210 mm 10 mm 16 mm 290 mm 210 mm 10 mm 18 mm 330 mm 240 mm 10 mm 20 mm 330 mm 240 mm 12 mm 22 mm 330 mm 240 mm 12 mm 25 mm 330 mm 240 mm 12 mm 30 mm 330 mm 240 mm 12 mm 35 mm 330 mm 240 mm 12 mm Sharpening: Can be sharpened with diamond-shaped or thin flat metal files (both classic and diamond files are suitable) We recommend regularly cleaning the drill bits from residue, lubricating with vegetable-based oil to prevent corrosion, and storing in a dry place (steel is susceptible to rust) Made in Japan – STAR-M
