
Drill diameter specification is how many electric drill drill specifications size complete
Twist drill specifications:Φ Φ 1.0, 2.5, 1.5, 2.0, Φ Φ Φ Φ 3.0, 3.2, 3.3, 3.5 and 3.8, Φ Φ Φ Φ 4.0, 4.2, 4.5 and 4.8, Φ Φ Φ Φ 5.5, 5.0, 5.2, Φ Φ Φ 5.8, Φ Φ 6.0, 6.2, 6.5, 6.8 and 7.0, Φ Φ Φ Φ 7.2, Φ 7.5, Φ Φ 7.8, 8···