# Drill bit Irwin 10501921 twist drill bit 4 mm

**URL:** https://aio.lv/en/product--irwin-10501921--4906805
**Data updated:** 2026-03-07 15:04 (EET)
**Category:** Drill Bits
**Manufacturer:** Irwin
**Manufacturer code:** 10501921
**EAN:** 5709131000303
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 4.99 €
**Prices and availability valid until:** 2026-07-13 23:59
**Price without VAT (21%):** 4.12 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--irwin-10501921--4906805

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | Friday | free |
| Pickup points | 26.06.2026 | 1.99 EUR |
| Courier delivery to door | 26.06.2026 | 4.99 EUR |

## Summary description

Irwin 10501921 is a 4 mm twist drill bit designed for drilling tasks. Manufactured for general-purpose drilling, this solid twist bit suits work in metal, wood and some plastics depending on machine and feed. It delivers precise 4 mm holes for assembly, maintenance and DIY projects and is used with standard chucks.

## Long description

Irwin 10501921 twist drill bit 4 mm is a general-purpose solid twist bit designed for cordless low-RPM multi-purpose drilling. Made to work in a range of common construction and DIY materials, this 4 mm diameter bit provides precise holes for assembly, maintenance and small renovation tasks. It is intended for rotary drilling only and is compatible with standard drill chucks used on corded and cordless drills.
Advantages
The bit features a unique four-facet ground carbide tip that reduces required drilling pressure and improves centring, helping produce clean, accurate 4 mm holes. Its design minimizes walking at the start of the hole, which is particularly useful when drilling ceramic tiles and other hard surfaces. The carbide tip and solid twist geometry make the bit suitable across a broad set of materials while maintaining hole quality and tool life under appropriate drill speeds and feeds.
Suitable for
 Drilling metal sheets and light-gauge steel
 Woodworking, timber and laminated panels
 Plastics and acrylics
 Brickwork, breeze block and masonry (rotary drilling only)
 Ceramic tiles and hardened floor tiles (rotary drilling only)
 Drywall and slate
Key specifications
 Diameter: 4 mm
 Design: solid twist drill bit
 Tip: four-facet ground carbide tip for reduced pressure and accurate centring
 Suitable drilling mode: rotary (no hammer/percussion)
 Intended use: low RPM cordless and standard drills with standard chucks
 Materials: metal, wood, plastics, masonry, tiles, drywall, slate
How to use
Install the 4 mm twist drill bit securely into the drill chuck and tighten according to the drill manufacturer's instructions. Use rotary drilling mode only; do not use hammer or percussion action. Select an appropriate low to moderate RPM for the material being drilled and apply steady, even pressure—allow the carbide tip to cut without excessive force. For metals and plastics, use cutting fluid or lubricant where recommended to extend bit life and improve chip evacuation. For tiles and masonry, start at low speed to prevent walking and maintain control until the tip has established the hole.
Usage recommendations
Wear appropriate eye and hand protection when drilling. Match drilling speed and feed to the material: lower speeds for hard materials such as tiles and metal, moderate speeds for wood and plastics. Replace the bit if the tip becomes dull, chipped or if drilling performance degrades. Do not use percussion or hammer action with this bit to avoid tip damage.

## Specifications

| Feature | Value |
|---|---|
| Length | 80 mm |
| Proper use | Drill |
| Suitable for materials | Brick, Glass, Light concrete, Marble, Sheet metal, Wood |
| Drill bit diameter | 4 mm |
| Shank diameter | 4 mm |
| Shank shape | Cylindrical shank |
| Drill bit type | Twist drill bit |

## FAQ

### How much does the Twist drill bit Irwin 10501921 4 mm cost, and is it available for purchase?

The price is 4.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 39 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 Friday 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/4906805/59176464_large.webp