# Combination wrench Unior U600371 20 mm, open-end and box-end hand tool

**URL:** https://aio.lv/en/product--unior-u600371--12403822
**Data updated:** 2026-04-30 18:29 (EEST)
**Category:** Wrenches & Adjustable Wrenches
**Manufacturer:** Unior
**Manufacturer code:** U600371
**EAN:** 3838909003719
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 15.99 €
**Prices and availability valid until:** 2026-07-12 23:59
**Price without VAT (21%):** 13.21 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--unior-u600371--12403822

## 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

Unior combination wrench U600371 is a 20 mm hand tool featuring an open-end on one side and a boxed (ring) end on the other for fastening and loosening nuts and bolts. Manufactured by Unior, this single-size spanner is suitable for bicycle, automotive and maintenance tasks where a precise 20 mm fit is required.

## Long description

The Unior combination wrench U600371 20 mm is a single-size hand tool with an open-end on one side and a box (ring) end on the other. Designed for tasks that require a precise 20 mm fit, the wrench provides two common engagement options for fastening and loosening hexagonal nuts and bolts. Manufactured by Unior, this combination spanner is intended for bicycle maintenance, automotive repairs and general workshop or household use where consistent torque and access to confined fasteners are needed.
Advantages
The tool combines the speed and accessibility of an open-end with the secure engagement of a box-end, reducing rounding of fasteners and improving control during turning. Its single-size format simplifies tool selection when a 20 mm fastener is present and lowers the weight and bulk compared with multi-piece sets. The box-end offers multiple contact points for even torque distribution, while the open-end allows work on fittings with limited clearance or partially obstructed fasteners.
Suitable for
Bicycle repairs and component adjustments that require a 20 mm spanner
Automotive maintenance tasks such as brake caliper, suspension or body fasteners sized 20 mm
Workshop and garage use for assembly, disassembly and routine maintenance
Household plumbing or mechanical jobs where a reliable 20 mm wrench is needed
When it may not be suitable
This single-size combination wrench is not a substitute for a full metric set when you face fasteners of various sizes; frequent work on different diameters will require additional spanners. Also, for very high torque applications or impact work, a dedicated torque wrench or impact-rated tools are more appropriate, as standard hand spanners are not designed for impact loads.
Key specifications
Size: 20 mm across flats
Type: Combination wrench with open-end and box-end
Material: heat-treated alloy steel (typical for hand spanners)
Drive/contact: 6- or 12-point box engagement depending on model design
Finish: corrosion-resistant surface treatment (chrome or similar plating)
How to use
Select the box-end for maximum contact and reduced risk of rounding when the fastener is accessible and there is room for the wrench to engage fully. Use the open-end side for fasteners in tighter spaces or where the fastener must be approached from the side. Position the wrench so that force is applied along the handle axis and pull rather than push when possible to reduce the chance of slippage. Inspect the fastener and wrench for wear before use and avoid using the wrench on rounded or damaged heads.
What to consider before purchase
Confirm that the fasteners you will work on are 20 mm in size
Consider whether you need a single spanner or a full set for broader coverage
Check compatibility with tight access points and the orientation of the box-end/reach
Decide if corrosion-resistant finish or specific material hardness is required for your environment
Usage recommendations
Use the box-end for initial loosening or final tightening where full engagement is possible, and switch to the open-end for quick adjustments or when space is restricted. Store the wrench in a dry toolbox or hang it on a rack to maintain the finish and check regularly for straightness and wear before applying high torque.

## FAQ

### How much does the Unior U600371 20 mm combination wrench cost, and is it available for purchase?

The price is 15.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 10 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 Unior 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 Unior 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/12403822/68691198_large.webp