Features:
• A variety of diameter sizes of drilling, reaming, chamfering, deburring and drilling.
• Unique step structure, one drill can open various sizes of aperture, a ladder drill to a box bit.
• Scope of application: automotive sheet metal, repair and modification, bridge doors and windows, home appliances.
• Can be used for the following equipment: hand-held drilling machine, drilling machine milling machine, machining center.
• Titanium alloy coating reduces friction and they are more durable than uncoated drill bits.HSS(High speed steel) has a longer service life.
PRODUCT PARAMETERS
Size:
4-12, 9 Steps (Diameter 4, 6, 8, 10, 12mm)
3-12, 9 Steps (Diameter 3, 4, 5, 6, 7, 8, 9, 10, 11, 12mm)
4-20, 9 Steps (Diameter 4, 6, 8, 10, 12, 14, 16, 18, 20mm)
Package:
• 3Pcs straight groove step drill bits, 4-12/4-20/3-12mm 29Sizes,main material high speed steel, titanium coated high quality step drill bits.