Item Type: Combined Tap Drill_x000D_ Material: High speed steel_x000D_ Surface Treatment: Surface Ti treatment_x000D_ Metric Specifications: M3x0.5, M4x0.7, M5x0.8, M6x1, M8x1.25, M10x1.5_x000D_ US System Specifications: 1/4-20NC, 12-24NC, 10-24NC, 10-32NC, 8-32NC, 6-32NC_x000D_ Hex Handle Diameter: 1/4in_x000D_ Extension Rod: Length: Approx. 60mm / 2.36in, Shank Diameter: 1/4in 1SPIRAL GROOVE DESIGN: The tap adopt spiral groove design, the chip removal effect is better, more efficient 2HIGH HARDNESS AND LONG LIFE: Using high speed steel material, possess high hardness and long life, wear resistant and durable 3WIDE RANGE OF APPLICATIONS: Can be drilled in copper, brass, aluminum, metal plates and plastics for a wide range of applications 4DURABLE AND CORROSION RESISTANT: Metric tap drill come with Ti plated surface, durable and corrosion resistant 5SAVING TIME AND EFFORT: Drilling and tapping can be carried out at the same time, saving time and effort, very practicalConfirm the appropriate size before use, and do a good job of safety protection during use. 12 x Combined Tap Drill 1 x Extension Rod 1 x Plastic Case