# Countersink drill bit Wiha 79186 B5

**URL:** https://aio.lv/en/product--wiha-28027--1860853
**Data updated:** 2026-01-13 17:33 (EET)
**Category:** Drill Bits
**Manufacturer:** wiha
**Manufacturer code:** 28027
**EAN:** 4010995280277
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 98.49 €
**Prices and availability valid until:** 2026-07-15 23:59
**Price without VAT (21%):** 81.40 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--wiha-28027--1860853

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 16.07.2026 | free |
| Pickup points | 21.07.2026 | 1.99 EUR |
| Courier delivery to door | 21.07.2026 | 4.99 EUR |

## Summary description

The Wiha 79186 B5 set includes 5 countersink drill bits in sizes 6.3, 8.3, 10.4, 12.4, and 16.5 mm. Each bit is 35 mm long and comes in a convenient box for easy storage. Ideal for creating smooth, conical holes in wood and metal, these bits ensure precise drilling and a clean finish. Perfect for professionals and DIY enthusiasts alike.

## Long description

The Wiha 79186 B5 countersink drill bit set contains five precision-ground countersinks designed to produce clean, conical recesses for screw heads and fasteners. Each countersink measures 35 mm in overall length and is supplied in a compact storage box for organized transport and easy access. The set covers common sizes used in joinery and metalwork, providing consistent chamfering and deburring for wood and metal substrates.
Advantages
Each bit in the set is manufactured to provide accurate cone angles and smooth cutting edges that reduce splintering in wood and minimize burr formation in metal. The uniform length simplifies depth control while the included storage box protects cutting edges and keeps sizes sorted. The set’s range of diameters makes it straightforward to match countersink size to screw head or plug diameter for a flush finish.
Suitable for
 Creating conical recesses for wood screws in furniture assembly
 Deburring and chamfering metal sheet edges before fastening
 Preparing holes for plug or dowel installation in cabinetry
 General workshop and maintenance tasks requiring precise recessing
Key specifications
 Set composition: 5 countersink drill bits
 Available diameters: 6.3 mm, 8.3 mm, 10.4 mm, 12.4 mm, 16.5 mm
 Overall length per bit: 35 mm
 Material compatibility: wood and metal
 Storage: compact protective box included
How to use
Select the countersink size that matches the screw head or plug diameter, clamp the workpiece securely, and mark the hole center. Fit the countersink into a suitable drill chuck or holder, align perpendicular to the work surface, and apply steady, moderate feed while running the drill at an appropriate speed for the material. Withdraw occasionally to clear chips and check the recess depth until the screw head sits flush or at the desired depth.
Usage recommendations
For best results, use light cutting oil when countersinking ferrous metals and choose lower drill speeds for larger diameters or harder materials. Always wear appropriate eye protection and secure small workpieces in a vice or clamp to prevent movement during drilling.

## Specifications

| Feature | Value |
|---|---|
| Length | 35 mm |
| Proper use | Drill |
| Package type | Box |
| Number of drill bits | 5 pc(s) |
| Drill bit set sizes | 6.3, 8.3, 10.4, 12.4, 16.5 |
| Drill bit type | Countersink drill bit |

## FAQ

### How much does the Countersink drill bit Wiha 79186 B5 cost, and is it available for purchase?

The price is 98.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 5 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 16.07.2026 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 wiha 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 wiha 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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