# Drill bits Proline 78041K, metal, Ø4.1 mm, length 75 mm, 2 pcs

**URL:** https://aio.lv/en/product--proline-78041k--11720586
**Data updated:** 2026-03-08 11:23 (EET)
**Category:** Drill Bits
**Manufacturer:** Proline
**Manufacturer code:** 78041K
**EAN:** 5903755153913
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 6.99 €
**Prices and availability valid until:** 2026-07-13 23:59
**Price without VAT (21%):** 5.78 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--proline-78041k--11720586

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 06.07.2026 | free |
| Pickup points | 09.07.2026 | 1.99 EUR |
| Courier delivery to door | 09.07.2026 | 4.99 EUR |

## Summary description

Proline Tools 78041K is a set of two metal drill bits with a diameter of 4.1 mm and a length of 75 mm. Designed for drilling metal and similar materials, the set includes two identical HSS-style bits suitable for use in handheld drills and drill presses. Practical for light- to medium-duty metalworking, repairs and assembly tasks.

## Long description

Proline 78041K is a set of two metal drill bits with a 4.1 mm diameter and 75 mm overall length. Manufactured from high-speed steel with 5% cobalt (HSS-Co), these bits are ground entirely to ensure precision and straightness of holes. The 135° point angle with chamfering adjustment improves centring and allows fast, cleaner penetration in high-alloy and difficult-to-machine metals; the bits are suitable for use in handheld drills and drill presses and are supplied in a blister pack containing two identical pieces.
Advantages
The HSS-Co composition provides elevated temperature resistance and extended tool life when drilling hard and heat-prone materials. A 135° split point reduces walking at the drill start and lowers the need for pilot holes, while full grinding of the flute and body ensures accurate hole straightness and repeatable results. The 75 mm overall length offers sufficient reach for common workshop and repair tasks without compromising stability.
Suitable for
 Drilling high-alloy steels and stainless steels
 Working with titanium and acid-resistant metals
 Light- to medium-duty metal repairs and assembly
 Use in handheld drills and drill presses
Key specifications
 Diameter: 4.1 mm
 Overall length: 75 mm
 Material: high-speed steel with 5% cobalt (HSS-Co)
 Point angle: 135° with chamfering adjustment
 Manufacturing: fully ground flutes and body for accuracy
 Pack quantity: 2 pieces
How to use
Secure the workpiece and mark the drilling position. Use a centre punch for best results if necessary. Fit the 4.1 mm Proline bit into a suitably rated drill chuck, ensure the chuck is tightened, and select an appropriate cutting speed for the workpiece material—lower speeds for stainless and high-alloy steels. Apply steady pressure without excessive force and periodically withdraw the bit to clear chips and reduce heat buildup. For deeper holes, cool with cutting fluid to maintain tool life and hole quality.
Usage recommendations
Use cutting fluid or coolant when drilling high-alloy or stainless steels to reduce heat and extend drill life. Start at reduced speed to avoid workpiece damage, and check bit sharpness regularly; replace when wear affects hole accuracy. Store the bits in their blister pack or a dry tool organiser to prevent corrosion and protect the cutting edges.

## Specifications

| Feature | Value |
|---|---|
| Length | 75 mm |
| Metal drill bits diameter | 4.1 |
| Number of drill bits | 2 pc(s) |

## FAQ

### How much does the Proline drill bits 78041K Ø4.1 mm 75 mm, 2 pcs cost, and is it available for purchase?

The price is 6.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 100 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 06.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All Proline products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized Proline service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

https://aio.lv/img/cache/product/11720586/67193504_large.webp