# Circle cutter drill bit KWB 178100 diameter 9 cm

**URL:** https://aio.lv/en/product--kwb-178100--11438005
**Data updated:** 2026-02-10 16:13 (EET)
**Category:** Home Goods Accessories
**Manufacturer:** KWB
**Manufacturer code:** 178100
**EAN:** 4009311781000
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 38.99 €
**Prices and availability valid until:** 2026-07-12 23:59
**Price without VAT (21%):** 32.22 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--kwb-178100--11438005

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 14.07.2026 | free |
| Pickup points | 17.07.2026 | 1.99 EUR |
| Courier delivery to door | 17.07.2026 | 4.99 EUR |

## Summary description

The KWB 178100 circle cutter drill bit features a diameter of 9 cm and is designed for precise circular cuts in various materials. Ideal for creating holes in wood, drywall, and other surfaces, this drill bit ensures clean and accurate results. With its durable construction, it provides long-lasting performance for both professional and DIY projects.

## Long description

The KWB 178100 circle cutter drill bit has a 9 mm shank and an adjustable cutting arm for circles from 20 to 90 mm. The cutter is tipped with tungsten carbide for durability and is intended for cutting clean circular openings in materials such as tiles, bricks, plaster and plastics. Its construction supports repeated use in general renovation and installation tasks where precise round holes are required.
Advantages
The tungsten carbide tip provides increased wear resistance for longer tool life compared with standard steel cutters. Continuous adjustment of the cutting arm allows quick selection of diameters between 20 and 90 mm without changing tools. A 9 mm shank fits common drill chucks and enables stable mounting during operation.
Suitable for
 Cutting circular openings in tiles and ceramic materials
 Drilling round holes in brick and plaster
 Making precise circular cuts in plastic sheets and panels
 General renovation tasks that require round holes for pipes, conduits or fittings
Key specifications
 Adjustable cutting diameter: 20–90 mm
 Cutting tip material: tungsten carbide
 Shank diameter: 9 mm
 Suitable for: tiles, bricks, plaster, plastics
How to use
Secure the 9 mm shank in a compatible drill chuck and set the cutting arm to the required diameter between 20 and 90 mm. Position the cutter perpendicular to the work surface and start the drill at a moderate speed, applying steady pressure. For brittle materials such as tile or plaster, begin at low speed and increase gradually; use water for cooling when cutting ceramic or stone-like materials to reduce heat and extend tip life. After cutting, clear debris and inspect the edge for any necessary finishing.
Usage recommendations
Use appropriate personal protective equipment (safety glasses, gloves and dust mask), secure workpieces before cutting and avoid excessive side load on the cutting arm. For best results on ceramic tiles or stone-like surfaces, use water cooling and steady, moderate drilling speed.

## Specifications

| Feature | Value |
|---|---|
| Product colour | Silver |
| Proper use | Drill |
| Suitable for materials | Brick, Hard ceramic, Plastic, Roofing tile, Soft ceramic wall tile |
| Drill bit diameter | 90 mm |
| Shank diameter | 9 mm |
| Number of drill bits | 1 pc(s) |
| Drill bit type | Circle cutter drill bit |

## FAQ

### How much does the Circle cutter drill bit KWB 178100 cost, and is it available for purchase?

The price is 38.99 € (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 14.07.2026 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 KWB 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 KWB 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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