# Drill bit set Proline 77841K — metal, Ø 4.1 mm, length 75 mm, 2 pcs

**URL:** https://aio.lv/en/product--proline-77841k--11720583
**Data updated:** 2026-03-08 11:23 (EET)
**Category:** Drill Bits
**Manufacturer:** Proline
**Manufacturer code:** 77841K
**EAN:** 5903755154361
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 5.49 €
**Prices and availability valid until:** 2026-07-14 23:59
**Price without VAT (21%):** 4.54 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--proline-77841k--11720583

## 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 77841K drill bit set for metal: two HSS bits with diameter 4.1 mm and length 75 mm. Designed for drilling through metal sheets and components, suitable for use with handheld drills and drill presses. Pack of 2 provides spares or matched bits for repetitive metalworking tasks and maintenance.

## Long description

Proline 77841K drill bit set — two HSS metal drill bits with a nominal diameter of 4.1 mm and a length of 75 mm, supplied in a blister pack. These bits are designed for drilling through metal sheets and components and are compatible with handheld drills and drill presses. Each bit is fully ground and features a 135° point angle with chamfering adjustment to facilitate fast centre starting and reduce walking during marking and positioning.
Advantages
The bits are made entirely by precision grinding for consistent geometry and straightness. A titanium nitride coating increases wear resistance and extends tool life while improving hole surface finish. The 135° point angle with chamfering adjustment optimises cutting action for metal, reducing burr formation and enabling quicker drilling operations. Supplied as a pack of two, the set provides an immediate spare or matched pair for repetitive tasks.
Suitable for
 Drilling holes in steel sheets and light metal components
 Use with handheld electric drills and drill presses
 Maintenance, repair and repetitive metalworking tasks
 Pilot holes for fastening and assembly work
Key specifications
 Material: high-speed steel (HSS)
 Coating: titanium nitride (TiN)
 Diameter: 4.1 mm
 Overall length: 75 mm
 Point angle: 135° with chamfering adjustment
 Manufacturing: fully ground flutes and tip
 Pack quantity: 2 pieces
How to use
Secure the workpiece and select an appropriate clamping method to prevent movement. Fit the 4.1 mm Proline bit into the drill chuck and tighten securely. When drilling metal, use a suitable cutting speed and moderate feed pressure; apply cutting fluid or lubricant to improve chip evacuation and reduce heat. Start at low speed to establish the hole, then increase speed as appropriate for the material. Withdraw the bit periodically to clear chips and avoid clogging.
Usage recommendations
For best results on steel and other ferrous metals, use cutting oil and a drill press when possible. Match drill speed to material thickness and hardness: lower speeds for harder or thicker metal. Replace bits when wear becomes visible or when finish quality degrades to maintain accuracy and reduce risk of breakage.

## Specifications

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

## FAQ

### How much does the Drill bit Proline 77841K Ø 4.1 mm, 75 mm, 2 pcs cost, and is it available for purchase?

The price is 5.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 50 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/11720583/67193514_large.webp