5-Piece High-Speed Steel Twist Drill Bit Set – Flat Shanks, Quick-Change for Electric Drills, Wood Plastic Alum & Metal Drilling, 1/8, 5/32, 3/16, 1/4, 5/16 Inches, for Pro & DIY Projects

5-Piece M35 Cobalt Drill Bit Set with 135° Split Points and 3-Flat Shanks

Product Description

Handle everyday metal drilling projects with this five-piece M35 high-speed steel drill bit set. Made with 5% cobalt, these bits offer heat and wear resistance for working with suitable grades of stainless steel, steel, and cast iron.

The set includes five fractional-inch sizes for workshop projects, automotive maintenance, fabrication, and general repairs. Drilling results depend on material hardness, thickness, operating speed, and tool setup.

Key Features

M35 High-Speed Steel with 5% Cobalt
Cobalt-alloy construction helps the cutting edges withstand heat and wear during metal drilling.

135° Split-Point Tips
Designed to help reduce wandering when starting a hole. A center punch may still be helpful on smooth or curved metal surfaces.

Fully Ground Spiral Flutes
Spiral flutes help move chips out of the hole. Appropriate operating speed and regular chip clearance support controlled drilling.

3-Flat Shank Design
Flat shank surfaces help improve grip in compatible three-jaw drill chucks. Confirm chuck capacity before installation. Not designed for direct insertion into hex quick-change holders.

Five Practical Sizes
Includes one bit in each listed size for different hole diameters and everyday metalworking tasks.

Specifications

Material: M35 High-Speed Steel

Cobalt Content: 5%

Point Design: 135° Split Point

Shank Style: 3-Flat

Package Contents: 5 Drill Bits

Drill Bit SizeApproximate Metric Equivalent1/8 in3.18 mm5/32 in3.97 mm3/16 in4.76 mm1/4 in6.35 mm5/16 in7.94 mm

Metric values are conversions of the inch sizes, not separate metric-sized bits.

Installation & Use Guide

Select the size: Choose the required bit diameter and confirm compatibility with your drill chuck.

Disconnect power: Unplug the drill or remove its battery before installing or changing bits.

Install the bit: Center the shank in the chuck and tighten according to the drill manufacturer’s instructions. Remove the chuck key if applicable.

Secure the material: Clamp the workpiece to a stable surface and mark the drilling position. Use a center punch where appropriate.

Start drilling: Select rotary drilling mode without hammer or impact action. Begin slowly and follow the recommended speed for the material and bit size.

Maintain control: Apply steady pressure without forcing the bit. Follow the bit manufacturer’s material-specific drilling instructions. Stop the tool before clearing accumulated chips.

Clean and store: Allow the bit to cool before handling. Remove debris with a brush, wipe dry, and store in a dry location.

Safety & Care

Wear eye protection. Keep hands, loose clothing, and hair away from rotating parts. Do not hold small workpieces by hand while drilling. Stop using bent, chipped, or damaged bits. Keep out of reach of children.

After-Sales Service

For missing or damaged items, compatibility questions, or help with product use, please contact us through TikTok Shop. We will review the issue and assist with an appropriate solution.