# Step Drill Bit GRAPHITE 57H739 cylindrical steps 4–22 mm set (4,6,8,10,12,14,16,18,20,22 mm)

**URL:** https://aio.lv/en/product--graphite-57h739--10662409
**Data updated:** 2026-03-07 17:57 (EET)
**Category:** Drill Bits
**Manufacturer:** GRAPHITE
**Manufacturer code:** 57H739
**EAN:** 5902062577399
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 18.99 €
**Prices and availability valid until:** 2026-07-15 23:59
**Price without VAT (21%):** 15.69 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--graphite-57h739--10662409

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 06.07.2026 | free |
| Pickup points | 09.07.2026 | 1.99 EUR |
| Courier delivery to door | 09.07.2026 | 4.99 EUR |

## Summary description

Step drill bit by GRAPHITE, model 57H739, featuring cylindrical stepped cutting profile covering diameters from 4 mm to 22 mm in incremental steps (4, 6, 8, 10, 12, 14, 16, 18, 20, 22 mm). Designed for drilling and enlarging holes in sheet metal, plastic and thin materials. Suited for hand drills and drill presses where multiple sizes are needed without tool changes.

## Long description

GRAPHITE step drill bit model 57H739 with a cylindrical stepped profile covers hole diameters from 4 mm to 22 mm in preset increments: 4, 6, 8, 10, 12, 14, 16, 18, 20 and 22 mm. The tool is intended for drilling and enlarging holes in sheet metal, plastic and other thin materials. Its stepped geometry allows sequential cutting of multiple diameters without changing tools, suitable for use in handheld drills and drill presses when a range of hole sizes is required.
Advantages
The stepped design reduces the need for multiple drill bits, saving time during size changes and simplifying workflow. Cylindrical step profiles provide stable centring and smoother cutting through thin materials. The single-piece construction minimizes wobble and improves concentricity compared with stacked or multi-piece alternatives. Compatible with common drill chucks, the bit supports fast switching between sizes and is practical for both on-site and workshop use.
Suitable for
Drilling and enlarging holes in sheet metal
Cutting holes in plastic panels and thin composite materials
On-site maintenance and installations requiring multiple hole sizes
General metalworking and electrical installations
Key specifications
Stepped diameter range: 4–22 mm with incremental steps at 4, 6, 8, 10, 12, 14, 16, 18, 20, 22 mm
Stepped cylindrical profile for sequential drilling
Intended materials: sheet metal, plastic and thin material types
Compatible with standard drill chucks (hand drills and drill presses)
Single-piece construction for improved concentricity and reduced wobble
How to use
Secure the step drill bit in the drill chuck and ensure it is tightened correctly. Mark the centre of the hole, align the drill perpendicular to the workpiece and start at a low speed to establish a pilot. Progressively advance to the required step to obtain the desired diameter, applying consistent feed pressure and cutting fluid when drilling metal to improve chip evacuation and tool life. Retract occasionally to clear chips and prevent overheating. After use, clean the bit of debris and store it dry to avoid corrosion.
Usage recommendations
For best performance on metal, use cutting oil and moderate speeds; reduce speed and increase feed for thicker or harder materials. When drilling thin sheets, clamp the workpiece to prevent deformation and burr formation. Replace the bit if wear or pronounced dulling occurs to maintain hole quality.

## FAQ

### How much does the Step Drill Bit GRAPHITE 57H739 4–22 mm cost, and is it available for purchase?

The price is 18.99 € (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 06.07.2026 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 GRAPHITE 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 GRAPHITE 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/10662409/57202511_large.webp