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5pcs High Quality HSS 6542 Step Drill Bits Set 6-13 steps Round Shank Straight Flute Hole Drilling Tool Pagoda Drills with Aluminum Case

5pcs High Quality HSS 6542 Step Drill Bits Set 6-13 steps Round Shank Straight Flute Hole Drilling Tool Pagoda Drills with Aluminum Case

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If you are looking for a set of step drill bits with high quality, this one is really a good choice.

Features:
Special step design, one drill for various drilling needs.
5pcs in a set, can meet most requirement for holes drilling.
Made of high-speed steel with high quality and good durability for you to use.
No need for a pilot hole, also can make a smooth, clean and perfectly round hole.
With functions that common twist drills don't have, such as deburring, round hole enlargement, etc.
Suitable for workpiece whose hardness less than 30°, such as iron plate, aluminum plate, PV plate, insulation board, etc.

Note:
Please inject water while using the drills for cooling and prolonging its service life.
It is recommended that drilling rate should be 250-400rpm.
When the items are used with pistol drill, metal thickness should be less than 3mm; when with bench drill, metal thickness should be 3-5mm.


Specifications:
Material: HSS 6542
Quantity: 5pcs
Drill Size:
#1: 1/4" to 1-3/8" 10 Steps: 1/4", 3/8", 1/2", 5/8", 3/4", 7/8", 1", 1-1/8", 1-1/4", 1-3/8"
#2: 3/16" to 7/8" 12 Steps: 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: 1/4" to 3/4" 9 Steps: 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4"
#4: 1/8" to 1/2" 13 Steps: 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"
#5: 3/16" to 1/2 6 Steps: 3/16", 1/4", 5/16", 3/8", 7/16", 1/2"
Package Size: 15 * 11 * 4cm / 5.91 * 4.33 * 1.57in
Package Weight: 457g / 16.11oz

Package List:
5 * Step Drills
1 * Metal Case

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