# Irwin twist drill bit set 10 pcs, 4.2 mm diameter, model 10502522

**URL:** https://aio.lv/en/product--irwin-10502522--11720861
**Data updated:** 2026-03-08 11:24 (EET)
**Category:** Drill Bits
**Manufacturer:** Irwin
**Manufacturer code:** 10502522
**EAN:** 05706915000672
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 25.49 €
**Prices and availability valid until:** 2026-07-12 23:59
**Price without VAT (21%):** 21.07 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--irwin-10502522--11720861

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 03.07.2026 | free |
| Pickup points | 08.07.2026 | 1.99 EUR |
| Courier delivery to door | 08.07.2026 | 4.99 EUR |

## Summary description

Irwin twist drill bit set (model 10502522) includes 10 identical twist drill bits with a 4.2 mm diameter for standard drilling tasks. Designed for use with hand and power drills, these bits provide straight drilling for general-purpose applications in materials compatible with twist drills. Supplied as a 10-piece set for repetitive or multi-user tasks.

## Long description

Irwin twist drill bit set 10 pcs, 4.2 mm diameter, model 10502522 contains ten identical 4.2 mm HSS cobalt twist drill bits designed for repeated drilling tasks with hand or power drills. Each bit is made from high-speed steel with 5% cobalt to increase heat and abrasion resistance, and features a heavy-duty web and a 135° split point that reduces walking and starts drilling immediately. Manufactured to DIN 338 standard, the set is intended for general-purpose and tougher metal drilling where enhanced wear resistance and strength are required.
Advantages
The cobalt-enhanced HSS composition offers increased durability and better performance when drilling hardened or alloyed steels. The 135° split point and precision ground geometry provide accurate, straight holes and reduced need for pilot punching. The uniform 4.2 mm size supplied in a 10-piece set supports repetitive tasks or multi-user environments, reducing downtime for bit changes and simplifying inventory for workshops.
Suitable for
Drilling holes in alloyed steel and other ferrous metals
General metalworking and fabrication tasks
Workshop and maintenance applications requiring multiple identical bits
Manual and powered drilling where heat and abrasion resistance is needed
Key specifications
Drill type: twist drill bit, HSS with 5% cobalt
Diameter: 4.2 mm
Overall length: 75 mm
Point angle and type: 135° split point for reduced walking
Shank: cylindrical shank for standard chucks
Quantity: 10 pieces per set
Standards: manufactured to DIN 338 drill specifications
Suitable materials: alloyed steel, stainless steel, general metal
How to use
Secure the drill bit in a compatible chuck and tighten firmly before operation. Select appropriate drill speed and use cutting fluid when drilling hardened or stainless steels to reduce heat buildup and extend bit life. Start drilling at low speed to establish the hole, then increase speed as necessary while maintaining steady, moderate feed pressure. Withdraw the bit occasionally to clear chips when drilling deeper holes and inspect the bit for wear; replace bits in the set when cutting performance declines.
Usage recommendations
For best results on hardened or stainless steels, use lubricant or cutting oil, moderate speed, and steady pressure. When drilling thin sheet metal, support the workpiece to prevent deformation and use a backing board where appropriate. Store bits in their case to protect cutting edges and keep sizes organized.

## Specifications

| Feature | Value |
|---|---|
| Length | 75 mm |
| Proper use | Drill |
| Carrying case | Yes |
| Working length | 43 mm |
| Suitable for materials | Alloyed steel, Metal, Stainless steel |
| Drill bit diameter | 4.2 mm |
| Shank shape | Cylindrical shank |
| DIN compliance | 338 |
| Point angle | 135 ° |
| Drill bit material | High-Speed Steel (HSS) |
| Number of drill bits | 10 pc(s) |
| Drill bit type | Twist drill bit |

## FAQ

### How much does the Irwin twist drill bits 10502522, 4.2 mm, 10 pcs cost, and is it available for purchase?

The price is 25.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 3 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 03.07.2026 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 Irwin 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 Irwin 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/11720861/67192949_large.webp