Description:
1PC or 3PCS 4-32mm 4-20mm 4-12mm HSS Cobalt Step Drills Nitrogen High Speed Steel Spiral
Specification:
Material: High Speed Steel 4241
Surface: Nitrogen treatment
Groove Type: Spiral Groove
Shank: Triangle Shank
Sizes:
1 * 4- 32 mm in 15 steps (4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32 mm)
1 * 4-20 mm in 9 steps (4, 6, 8, 10, 12, 14, 14, 18, 20mm)
1 * 4-12 mm in 5 steps (4, 6, 8, 10, 12mm)
Application: for Drilling Carbon Steel Sheet Iron Insulation Boards
Features:
● The most popular job that uses step drill bits is sheet metal working.
● People also use step drill bits on auto repair projects and apply them as countersinks.
● The Migiwata step bits come to a point and are thus self-starting. No need to use center punch.
● They are more durable and not prone to break compared with twist drills.
Quantity:
1pc(4-32mm) or 3pcs/set (optional)
Warning:
1. Due to manual measurement, please allow a bit error, thank you
2. Due to shooting problems such as light, there will be chromatic aberration, please be careful.
More Details:
