# Hex Bit Wera 840/1 IMP DC 4 mm — alloy tool steel, impact-rated hex bit

**URL:** https://aio.lv/en/product--wera-05073904001--1970254
**Data updated:** 2026-02-12 09:46 (EET)
**Category:** Screwdriver Bits
**Manufacturer:** Wera
**Manufacturer code:** 05073904001
**EAN:** 4013288158338
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 19.99 €
**Prices and availability valid until:** 2026-07-21 23:59
**Price without VAT (21%):** 16.52 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--wera-05073904001--1970254

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 23.07.2026 | free |
| Pickup points | 28.07.2026 | 1.89 EUR |
| Courier delivery to door | 28.07.2026 | 4.99 EUR |

## Summary description

Wera Hex Bit 840/1 IMP DC 4 mm is an impact-rated hex bit made from alloy tool steel for reliable torque transfer and durability. Designed for use with impact drivers and power tools, it fits 4 mm hex fasteners and resists wear during heavy-duty fastening. Suitable for professional and DIY applications requiring consistent fit and long service life.

## Long description

Wera Hex Bit 840/1 IMP DC 4 mm is an impact-rated hex bit made from alloy tool steel, crafted to deliver dependable torque transfer and extended service life. The 4 mm hex profile is engineered to fit hex fasteners precisely, while the impact-rated construction allows use with impact drivers and power tools for demanding fastening tasks. The bit's geometry and material selection focus on wear resistance and reduced deformation under high loads.
Advantages
The bit's alloy tool steel composition and heat treatment provide a balance of hardness and toughness that reduces breakage and rounding of hex profiles. Impact-rated design absorbs shock loads from impact drivers, maintaining a secure fit during repetitive fastening. Compact length and standardized 1/4-inch drive compatibility ensure broad compatibility with bit holders and quick-change chucks. Surface treatment increases corrosion resistance and improves service life in workshop and jobsite environments.
Suitable for
Driving and removing 4 mm hex screws with impact drivers and power tools
Heavy-duty fastening in metalworking, construction, and mechanical assembly
Professional repair and maintenance tasks requiring repeatable torque application
DIY projects where durable, impact-rated bits are preferred
Key specifications
Bit type: 4 mm hex (internal hexagon)
Material: alloy tool steel with heat treatment for improved hardness and toughness
Impact rating: designed for use with impact drivers and power tools
Drive interface: standardized 1/4" hex drive compatible with common bit holders
Length: compact design suitable for tight access (length varies by batch)
Surface finish: corrosion-resistant treatment for enhanced durability
How to use
Insert the 1/4" drive end of the Wera 4 mm hex bit securely into a compatible bit holder, quick-change chuck, or impact driver. Align the hex profile with the fastener recess and apply steady, controlled pressure while engaging the tool. For impact drivers, start at low speed to seat the bit, then increase power as needed. Inspect the bit and fastener engagement periodically during extended use to avoid cam-out and to ensure consistent contact between bit and fastener.
Usage recommendations
Use the bit with tools rated for impact use and appropriate torque settings for the fastener material. Replace the bit if signs of rounding, chipping, or excessive wear appear. Store bits in a dry environment and use compatible bit holders to minimize lateral stress and prolong service life.

## FAQ

### How much does the Wera Hex Bit 840/1 IMP DC 4 mm cost, and is it available for purchase?

The price is 19.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 8 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 23.07.2026 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. 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 Wera 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 Wera 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/1970254/47652073_large.webp