Tap size and pitch: M3 x 0.5, M4 x 0.7, M5 x 0.8, M6 x 1.0, M8 x 1.25
Pre hole drill: 0.1 - 0.1 - 0.2 - 0.2 inches (2.5 - 3.3 - 4.2 - 5.1 - 6.8 mm)
T-shaped handle: For 0.1 - 0.3 inches (3 - 8 mm)
Tap Material: Alloy tool steel
Drill Material: HSS (high speed steel)