LETON 5/32 M35 Cobalt High Speed Steel HSS Twist Drill Bits for Steel, Iron, Copper, Aluminum (10 Pack, 4.0mm Diameter)

This set of high-speed steel (HSS) drill bits boasts an impressive array of features that make it a versatile and reliable choice for a wide range of drilling applications. Designed for both handheld and stationary use (in a drill press), these drill bits are engineered to deliver exceptional performance, even when tackling the most challenging materials.

The key features of this drill bit set include:

1. 135-Degree Split Point Tip: The split point tip design enhances the drill bit's ability to self-center and penetrate the workpiece more efficiently, reducing the risk of wandering or walking during the drilling process.

2. HSS-Co Composition: The drill bits are made from HSS-Co (high-speed steel with cobalt) alloy, which provides superior tensile strength and enhanced heat resistance. This makes them well-suited for drilling through high-tensile materials, such as stainless steel.

3. Versatile Applications: These drill bits are suitable for a wide range of materials, including aluminum, wood, malleable metals, and even deep-hole drilling in iron. Their versatility allows users to tackle a variety of drilling tasks with a single set of tools.

4. Heat Treatment and Hardness: The drill bits have undergone a specialized heat treatment process that increases their hardness and wear resistance. This is particularly beneficial when working with difficult-to-machine materials, such as stainless steel and tool steel.

5. Cobalt Alloy Composition: The M35 cobalt high-speed steel composition provides exceptional hardness, wear resistance, and toughness. The addition of cobalt improves the drill bits' heat resistance, allowing them to perform and outlast standard HSS bits, especially when drilling tough metals.

6. Diverse Drilling Capabilities: The drill bits can be used with a variety of drilling equipment, including radial drills, bench drills, and hand drill chucks, making them a versatile choice for both professional and DIY applications.

7. Dimensional Specifications: The drill bits have a 5/32-inch (4.0 mm) diameter, with a flute length of 1 5/8 inches (43 mm) and a total length of 2 15/16 inches (75 mm). The real exact size is 3.97 mm, which is very close to the standard 5/32-inch (3.968 mm) diameter.

This set of 10 HSS-Co drill bits comes packaged in a convenient plastic case, with the size clearly marked on the shank tail for easy identification. Whether you're a professional machinist or a DIY enthusiast, this drill bit set offers the performance, versatility, and durability needed to tackle a wide range of drilling tasks with confidence.

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