JelBo Spiral Groove Step Drill Bits, 1/4'' Hex Shank HSS Titanium Coated Step Drill Bit Kit with Impact Driver for DIY Woodworking, Metal, Plastic(3Pcs/Set 4-12/4-20/4-32mm);

SPECIAL FEATURES:
✔ 1. Titanium alloy coating reduces friction and they are more durable than uncoated drill bits.HSS(High speed steel) has a longer service life.
✔ 2. The tapered design is suitable for drilling larger and deeper holes, or enlarging the aperture in areas where it has been drilled.

MEASUREMENT:
#4-12 5 Steps (Diameter 4, 6, 8, 10, 12mm)
#4-20 9 Steps(Diameter 4, 6, 8, 10, 12, 14, 16, 18, 20mm)
#4-32 15 Steps(Diameter 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32mm)

PACKAGE:
❤ 3 x Step drill bits

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