US PRO INDUSTRIAL Left Hand Drill Bit Set - 13 Piece

These drill bits are designed for use on a variety of materials including high tensile steel, hardened steels, stainless steel (Cr-Ni), and purpose-made acid-resistant metals.

The left-hand spiral design is specifically for removing broken or damaged studs and fasteners. It allows the bit to grip and potentially extract the broken part when drilling in reverse.

This composition provides longer life and durability, particularly when drilling challenging materials such as stainless steel and high alloy steel, ensuring superior performance and resistance to wear.

When using these bits, especially on hard materials, always set your drill to a low speed, especially when working in reverse. This will reduce heat buildup and increase the life of the drill bit.

Yes, it is highly recommended to use cutting oil when drilling tough or hard metals to lubricate the drill bit, reduce friction, and dissipate heat, extending the life of the bit and improving performance.

Select the drill bit size that corresponds to the fastener you are trying to remove or the hole size you need. The set includes a range of sizes from 1.5mm to 6.5mm, enabling the user to choose the bit diameter which is the most appropriate for the task.

While these bits can drill other materials, they are optimized for use on metals. They may work on softer materials, but their primary design and effectiveness are intended for harder materials.

The 135-degree split point ensures precise centering during spot drilling, reducing the tendency of the bit to 'walk' or drift from the intended starting point, thus promoting accuracy.

Check the drill speed and adjust as needed. Ensure you are using the correct bit for the material. Check for any damage or wear on the drill bit and replace if necessary. Apply cutting oil to the drill bit and material.

Reduce pressure and drill speed. Ensure the bit is properly aligned and perpendicular to the work surface. Use a pilot hole, especially in hard materials. Make sure the bit is the correct type and size for the application.

Stop drilling immediately. Reverse the drill to remove the bit. Ensure you are using the correct speed and pressure. Use cutting oil to lubricate the drill bit and prevent heat buildup.