# Diamond Hole Saw Set Bigstern 10 pcs — Bigstren 21641

**URL:** https://aio.lv/en/product--bigstern-5904665712245--11195412
**Data updated:** 2026-03-07 19:50 (EET)
**Category:** Drill Bits
**Manufacturer:** Bigstern
**Manufacturer code:** 5904665712245
**EAN:** 5904665712245
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 13.99 €
**Prices and availability valid until:** 2026-07-29 23:59
**Price without VAT (21%):** 11.56 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--bigstern-5904665712245--11195412

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 20.07.2026 | free |
| Pickup points | 23.07.2026 | 1.89 EUR |
| Courier delivery to door | 23.07.2026 | 4.99 EUR |

## Summary description

Diamond hole saw set by Bigstern, model Bigstren 21641, includes 10 pieces of diamond-coated core drill bits for cutting precise circular holes. Designed for drilling through hard materials such as tile, ceramic, porcelain, glass and stone. Suitable for use with rotary tools and drill presses for plumbing, electrical and tiling installations.

## Long description

Diamond hole saw set Bigstern 10 pcs — Bigstren 21641 is a collection of ten diamond-coated core drill bits designed for cutting accurate circular holes in hard surfaces. The set is intended for use on tile, ceramic, porcelain, glass and natural stone, and can be mounted in standard rotary drills and drill presses. The diamond coating and hollow-core construction enable controlled cutting with reduced cracking when used at appropriate speeds and with coolant or water.
Advantages
The diamond cutting edges provide consistent abrasion resistance and maintain cutting performance when working with brittle materials. A range of diameters in the ten-piece set allows selection of the correct hole size without improvising or combining multiple tools. The hollow design evacuates the core and eases removal of cut material, while compatibility with common drill chucks makes the bits suitable for both handheld and bench-mounted drilling equipment.
Suitable for
 Cutting holes for plumbing fixtures through ceramic and porcelain tiles
 Creating openings in glass and mirror panels for fittings
 Drilling precise circular holes in natural stone and engineered stone surfaces
 Installing electrical boxes or conduit penetrations in tiled walls
 Use with drill presses or hand drills for renovation and tiling work
Key specifications
 Set composition: 10 diamond-coated core drill bits with varying diameters
 Coating: industrial diamond grit bonded to cutting edge
 Suitable materials: tile, ceramic, porcelain, glass, natural stone
 Shank type: round shanks compatible with standard drill chucks
 Tool compatibility: rotary hand drills and drill presses
How to use
Secure the appropriate diameter bit in the drill chuck and mark the hole center on the workpiece. Start drilling at low speed to establish a shallow groove, then increase speed moderately while applying light, steady pressure. For brittle materials use continuous water cooling or periodic spraying to reduce heat and prevent cracking. Keep the drill perpendicular to the surface and pause occasionally to clear debris and allow the bit to stay cool. After cutting, remove the core plug and deburr the hole edge if necessary.
Usage recommendations
Use steady, consistent pressure and water cooling for best results on porcelain and natural stone. Avoid high drilling speeds and excessive force which can cause chipping. When working with glass, use a backing support to minimize breakthrough chipping. Inspect bits for wear and replace when diamond coating is significantly worn to maintain cutting quality and safety.

## FAQ

### How much does the Diamond Hole Saw Set Bigstern Bigstren 21641 cost, and is it available for purchase?

The price is 13.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 752 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 20.07.2026 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 Bigstern 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 Bigstern 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/11195412/61976898_large.webp