# Drill bit Proline HSS-TiN 4.2 mm, set of 2 pieces

**URL:** https://aio.lv/en/product--proline-5154378--10784718
**Data updated:** 2025-12-30 10:13 (EET)
**Category:** Drill Bits
**Manufacturer:** Proline
**Manufacturer code:** 5154378
**EAN:** 5903755154378
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 3.49 €
**Prices and availability valid until:** 2026-07-13 23:59
**Price without VAT (21%):** 2.88 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--proline-5154378--10784718

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 22.06.2026 | free |
| Pickup points | 29.06.2026 | 1.99 EUR |
| Courier delivery to door | 29.06.2026 | 4.99 EUR |

## Summary description

Proline HSS-TiN drill bits, 4.2 mm diameter, set of 2. Made from high-speed steel with titanium nitride coating for improved wear resistance and longer life. Designed for drilling metal, wood and plastics in general workshop and DIY tasks. Suitable for standard drill chucks; provides precise holes and consistent performance.

## Long description

Proline HSS-TiN 4.2 mm drill bit, set of 2 pieces, designed for drilling metal with precise results. Made of high-speed steel with a titanium nitride (TiN) coating to extend tool life and improve hole finish. The bit features a 135° split point with adjustable flute geometry to facilitate accurate starts and reduce walking. Diameter 4.2 mm, working length 43 mm, overall length 75 mm.
Advantages
The TiN coating increases wear resistance and reduces friction, which helps maintain cutting performance over time. A 135° split point improves centering and penetration in metal, while the ground flutes ensure consistent chip evacuation and smoother hole surfaces. Supplied as a pair for convenience and replacement.
Suitable for
 Drilling holes in metal (steel, non-ferrous metals)
 General workshop and DIY tasks
 Drilling in wood and plastics (where a 4.2 mm hole is required)
Key specifications
 Brand: Proline
 Model / MPN: 5154378
 EAN: 5903755154378
 Material: High-speed steel (HSS) with TiN coating
 Point angle: 135° (split point)
 Diameter: 4.2 mm
 Working length: 43 mm
 Overall length: 75 mm
 Quantity: Set of 2 pieces
How to use
Select an appropriate drill speed for the material being drilled (lower speeds for harder metals). Secure the workpiece and use a suitable drill chuck to hold the 4.2 mm bit firmly. Apply steady pressure, allow the bit to cut without forcing, and clear chips regularly. For precise starts in metal, use the split point to avoid walking; a center punch can be used where necessary. Use cutting fluid when drilling harder metals to reduce heat and extend bit life.
Usage recommendations
Store the drill bits dry and protected to preserve the TiN coating. Re-sharpen HSS bits when dull, observing the original point geometry. Replace bits when wear affects hole quality or increases required feed pressure.

## FAQ

### How much does the Drill bit Proline HSS-TiN 4.2 mm - 2 pcs cost, and is it available for purchase?

The price is 3.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 208 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 22.06.2026 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

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