# Drill bit Proline 78105K — metal drill diameter 10.5 mm, length 133 mm, 1 pc

**URL:** https://aio.lv/en/product--proline-78105k--11719835
**Data updated:** 2026-03-08 11:22 (EET)
**Category:** Drill Bits
**Manufacturer:** Proline
**Manufacturer code:** 78105K
**EAN:** 5903755154132
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 12.49 €
**Prices and availability valid until:** 2026-07-16 23:59
**Price without VAT (21%):** 10.32 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--proline-78105k--11719835

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 08.07.2026 | free |
| Pickup points | 13.07.2026 | 1.99 EUR |
| Courier delivery to door | 13.07.2026 | 4.99 EUR |

## Summary description

Proline 78105K drill bit for metal with a 10.5 mm cutting diameter and overall length of 133 mm. Single-piece set designed for drilling metal, suitable for use with handheld drills and drill presses. Provides precise hole creation in metalwork, maintenance and repair tasks, and workshop applications requiring a 10.5 mm hole.

## Long description

Proline 78105K is a single-piece HSS-Co metal drill bit with a cutting diameter of 10.5 mm and overall length of 133 mm, designed for precise hole making in demanding metalworking tasks. The bit features a 135° point angle with chamfering adjustment and is fully ground to ensure straightness and dimensional accuracy. Made from high-class high-speed steel with 5% cobalt, it offers improved heat resistance and wear performance for drilling into high-alloy steels, stainless steels, titanium, acid-resistant steels and cast iron, as well as other hard-to-machine materials.
Advantages
The 135° split point reduces walking at drill start and speeds up penetration, while the chamfering adjustment helps maintain accurate positioning. Full grinding produces consistent geometry and rectilinear holes. The 5% cobalt alloy increases thermal resistance and extends life when used in high-temperature, high-stress drilling conditions. Supplied individually in a blister pack, the bit is ready for use in handheld drills and drill presses.
Suitable for
 Drilling precise 10.5 mm holes in high-alloy and stainless steels
 Workshop maintenance and repair operations on metal components
 Production tasks requiring accurate through-holes in cast iron and titanium
 Use with handheld drills and drill presses for metal fabrication
Key specifications
 Cutting diameter: 10.5 mm
 Overall length: 133 mm
 Point angle: 135° with chamfering adjustment
 Material: high-speed steel with 5% cobalt (HSS-Co)
 Manufacturing: fully ground flute geometry for straightness and accuracy
 Application: suitable for high-alloy steels, stainless steels, titanium, acid-resistant steels and cast iron
How to use
Secure the drill bit in the chuck of a handheld drill or drill press, ensuring it is centered and tightened to prevent slippage. Mark the drilling position and, if needed, use a center punch to create a pilot dimple. Select an appropriate cutting speed and feed for the material being drilled; use lower speeds and steady feed when working with hard or heat-sensitive alloys. Apply cutting fluid or coolant to reduce temperature and prolong tool life. Withdraw the bit periodically to clear chips and to avoid clogging the flutes.
Usage recommendations
For best results when drilling high-alloy or stainless steels, use a steady moderate feed and apply suitable cutting fluid. Start with a pilot hole for larger diameters if precise alignment is critical. Inspect the bit for wear and replace when excessive chipping or loss of cutting performance is observed.

## Specifications

| Feature | Value |
|---|---|
| Length | 133 mm |
| Metal drill bits diameter | 10.5 |
| Number of drill bits | 1 pc(s) |

## FAQ

### How much does the Drill bit Proline 78105K 10.5 mm, 133 mm cost, and is it available for purchase?

The price is 12.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 100 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 08.07.2026 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 Proline 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 Proline 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/11719835/67194691_large.webp