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$65.99
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Rarapop M35 Cobalt HSS Step Drill Bit Set, Four Spiral Flute Step Drill Bit, Wear-Resistant TiALN Coated, 1/4" Hex Shank for Hard Metal, Carbon Steel, Stainless Steel, Wood, Plastic (2-Piece Set)
★★★★★
$65.99
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About this item
- Four Spiral Flute Design: Deflection during cutting is a common problem with ordinary step drills, but the four flute step drill is designed to provide greater stability. With improved accuracy and cutting speed, it's perfect for stainless steel drilling and the service life of four flute step drill bit is twice as long as that of ordinary.
- M35 Cobalt High Speed Steel: M35 cobalt high speed steel can be obtained by proper heat treatment with high hardness, high red hardness and high wear resistance. Its toughness and bending strength are higher than that of ordinary high-speed steel, which is better for hard materials.
- TiAlN Coating: Our TiAlN coating is a cutting-edge material with exceptional properties. It's extremely hard, can withstand high oxidation temperatures, and has excellent thermal hardness. Plus, it boasts strong adhesion, a low friction coefficient, and low thermal conductivity, making it an ideal choice for demanding applications.
- 135 °Cutting Angle: When it comes to drilling hard materials, the angle of the drill tip matters. That's why we've designed our drill bits with a 135° cutting angle. This angle reduces self-wear and provides a larger stress area, resulting in cleaner, more efficient drilling. Tip: The temperature of the drill will increase due to high speed rotation. It is suggested to add cutting oil or spray water to cool the drill during continuous operation, which can effectively prolong the service life of the ladder drill.
- Versatile Size Range: 4-12mm＜9 Steps＞(4,5,6,7,8,9,10,11,12). 4-20mm＜9 Steps＞(4,6,8,10,12,14,16,18,20). Allowing you to tackle a variety of projects, from drilling into stainless steel and aluminum to wood and plastic sheets.The 1/4-inch hex handle is designed to fit securely in lithium-ion drills, hand drills, and bench drills, making it a convenient tool for any toolbox and suitable for both home and professional use.
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What customers say about Bigamart
10 Trustpilot reviews total, with 2 shown at a time.
Trustpilot
★★★★★
Excellent
4.5 average rating
S
Sigalit
🇮🇱 · January 2026
★★★★★
I wrote to Bigamart's customer support and they accompanied the process of reshipping the item until it finally arrived. I felt a genuine effort to solve the problem till it was finally solved.
V
Verified buyer
🇦🇺 · November 2025
★★★★★
The package was here in Australia from England in a few days — so quick! Something was missing and they refunded it straight away. Pretty happy with these guys.
Showing 1–2 of 10 reviews
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