5PCS Step Drill Bits with Automatic Center Punch,High Speed Steel Unibit Step Drill Bit Set, Total 50 Sizes HSS Titanium Step Bits for Metal

HSS Titanium Coating: Thanks to the high speed steel material and titanium coating, the step drill has excellentsharpness and durability
118° bifurcation point tip and dual notch design: increases self-centering cutting speed, prevents walking, clearschips faster, and allows particles to escape easily
50 sizes, 5PC: The step drill bits set includes 5 standard bits that can replace 50 individual drill bits and an automatic center punch.
Scope of application: Suitable for plastic, aluminum, iron and other metal plate drilling (not recommended forstainless steel and wood, it is recommended to add coolant or water when drilling metal plate, the speed shouldnot be too high)
Equipped with a neat box, making the use and storage of the drill more convenient

Warm Tips:

To extend the service life of the step drill bit and facilitate drilling, it is best to add oil before using it.

When working with a step drill bit, you need to add water to keep the temperature down.

Specification:

#5 Bit：1/4", 3/8", 1/2", 5/8", 3/4", 7/8", 1", 1-1/8", 1-1/4", 1-3/8"

#4 Bit：3/16", 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4", 13/16", 7/8"

#3 Bit：1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4"

#2 Bit：3/16", 1/4", 5/16", 3/8", 7/16", 1/2"

#1 Bit：1/8", 5/32", 3/16", 7/32", 1/4", 9/32", 5/16", 11/32", 3/8", 13/32", 7/16", 15/32", 1/2"

118° X-type Split Point - Increases cutting speed with self-centering and prevents walking.

Two-flute Design - a faster and smoother cutting, allows particles escape easily. step drill bit

Tri-flatted shank will not spin inside the chunk, compatible with different types of drill machines effectively.

Application - suitable for sheet metal, plastic, aluminum alloy, copper, NOT recommended for high carbon steel, hard metal.

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