Pentagon Brake Caliper Wrench Set (SKU: G02527) – Professional 3-piece set for safe brake servicing
Are you looking for a reliable, professional and affordable tool for servicing brake systems? The pentagon brake caliper wrench set (SKU: G02527) is a premium 3-piece set of specialized 5-point socket wrenches. These wrenches are essential for safe, precise and fast removal and installation of brake calipers without the risk of material damage. The set is designed specifically for car mechanics, DIYers and anyone who is professionally or amateurishly involved in the maintenance of Opel, Mercedes, Smart, Peugeot, Renault and Girling brake systems.
Modern brake systems often use special security bolt profiles (pentagon or 5-point bolts) that prevent unauthorized unscrewing with standard tools. Without the appropriate dedicated wrench, changing brake pads or comprehensive caliper servicing is practically impossible. Using the wrong tool risks destroying the bolt head and expensive repairs. This specialized kit completely solves this problem and ensures smooth work in your workshop.
Key advantages and benefits of using the G02527 kit
Brakes are the most important safety element of any vehicle, so they require uncompromising precision when working. Our 3-piece set offers optimal fit, exceptional durability and wide compatibility with the most popular vehicle brands on the European market. Thanks to the standard 1/2 inch (1/2") drive, these bits can be easily used with your existing ratchet or torque wrench.

Precise fit without slipping: The special 5-point profile (pentagon) fits perfectly on the brake caliper safety screws, preventing the tool from slipping and damaging the screw head.
Wide vehicle compatibility: The kit covers key dimensions for popular vehicles such as Opel (Astra G, Zafira), Mercedes-Benz, Smart, Peugeot and Renault, as well as brake systems from the renowned manufacturer Girling.
Universal 1/2" square drive: All three bits in the set are equipped with a 1/2" drive, allowing for immediate use with standard workshop tools such as ratchets and torque wrenches.
Exceptional durability for demanding tasks: The wrenches are made of high-quality steel that can easily withstand high loads when loosening rusty, seized or tightly tightened brake bolts.
Unbeatable price-quality ratio: For the extremely affordable price of €13.99, you receive a professional tool that will save you time, nerves, and the high costs of visiting expensive service centers.

Technical specifications and kit contents
This specialized set contains three carefully selected attachments that are essential for working on brake systems from various car manufacturers:

1/2” internal 5-point socket 14 mm: Designed for Opel / Vauxhall vehicles (mainly Astra G and Zafira models), Mercedes-Benz and Smart.
1/2” internal hex socket 19 mm: Ideal for servicing brake systems on Peugeot and Renault vehicles.
1/2" external 5-point socket 10 mm: Specially adapted for working on GIRLING brake discs and systems.

Instructions for the correct and safe use of pentagon wrenches
Before starting work on the brake system, ensure maximum safety. Raise the vehicle stably and secure it with jack stands. Since the bolts on the brake calipers are directly exposed to moisture, road salt and dirt, we recommend the following procedure:

First, clean the bolts thoroughly with a wire brush to remove rust and dirt.
Apply a good quality penetrating oil or screw release spray (e.g. WD-40) to the screws and wait a few minutes for it to take effect.
Select the appropriate bit from the G02527 set and attach it to a manual 1/2" ratchet or torque wrench.
Carefully push the bit all the way onto or into the screw. Using even, controlled pressure, loosen the screw.
When reassembling brake calipers, always use a torque wrench and tighten the bolts to the specified torque values specified by the vehicle manufacturer. This ensures safe operation of the brake system while driving.

Why order the G02527 pentagon wrench set?
Don't let special safety bolts stop you in the middle of a job or force you to improvise with the wrong tool, which can lead to costly damage to your brake components. The pentagon brake caliper wrench set (SKU: G02527) is an indispensable accessory that should not be missing in any toolbox - regardless of whether you are a professional car mechanic or you are doing your own maintenance on your steel horse at home. Order your set today and ensure a fast, professional and safe brake replacement!

Frequently Asked Questions (FAQ) about the product
1. Why can't I use a regular Allen or Torx wrench?
Car manufacturers use specific 5-point (pentagon) security bolts on brake calipers precisely to prevent tampering with standard tools. Classic 6-point Allen or Torx keys will not fit these bolts. If you try to use the wrong tool, you will inevitably destroy the bolt head, which will make removal much more difficult and result in high additional repair costs.
2. Are these bits suitable for use with an impact driver?
These bits are intended for manual use only with a 1/2" ratchet or torque wrench. To ensure long tool life and to prevent damage to the safety screws on the brake calipers, we strongly advise against the use of pneumatic, electric or cordless impact wrenches.
3. Which car models is this kit best suited for?
The kit is extremely versatile and covers a wide range of vehicles on our roads. The 14 mm adapter is great for Opel (especially Astra G and Zafira), Mercedes-Benz and Smart. The 19 mm adapter is designed for Peugeot and Renault vehicles, while the 10 mm adapter is indispensable for all cars equipped with brake systems from the renowned Girling brand.


Responsible persons:
GEKO - GEKO SPÓŁKA Z OGRANICZNĄ ODPOWIEDZIALNOŚCIA SPÓŁKA KOMANDYTOWA, ul. Spacerowa 3, 97-500 Kietlin, Poland, (+48) 446824004, geko@geko.pl
Distributor for Slovenia: Haloorodje.si, Online Sales, Rok Groznik sp, Podturn 42, 8350 Dolenjske Toplice, info@haloorodje.si, +38669731944, Slovenia
Product origin: China

Instructions for using the product:
• Select the appropriate size wrench for the brake caliper bolt.
• Place the wrench correctly on the screw and check that it fits snugly.
• Loosen or tighten the screw with even force.
• After finishing work, check that the screws are properly tightened.

Useful tips for work:
• The set is intended for servicing brake calipers.
• Using the correct wrench size reduces the chance of damaging the bolt.
• Clean the bolt and the area around the brake caliper before working.
• Clean the keys after use and store them in a dry place.

Warnings:
• Wear safety glasses and gloves when working.
• Do not use a damaged or worn key.
• Do not use extensions or excessive force if the tool is not intended for this purpose.
• After working on the brake system, always check that the brakes are working properly.
• If you are not qualified to service brakes, leave the work to a professional.

Same summary

The pentagon wrench set for brake calipers is primarily suitable for users who undertake servicing or replacing brakes on vehicles where they encounter special pentagonal bolts. Such a set best serves individuals with basic experience in a home workshop who need a specific tool for a precise task. Due to the specialized shape, the type of bit is not intended for general use on all bolts or as a universal set for various types of tasks. It is recommended to check the type of bolts on the vehicle, as pentagon wrenches are not compatible with the more common hexagonal, Allen or Torx bolts.

Recommendation source: Enaa guides and team experiences.

User view

Typical users of this set are amateur mechanics or those who want to independently replace and maintain brake calipers on cars with pentagon bolts. In practice, the set is useful mainly for older or less common vehicle models, where other types of wrenches are not sufficient. The specialized shape is an advantage when dismantling components that require a precise fit.

Users also often appreciate the reputation of the Geko brand, as it is known for producing robust hand tools that meet the needs of home and semi-professional use.

Why buy at Enaa

When shopping at Enaa, you can easily compare similar sets within a category and quickly choose the tool that really suits your needs. In addition, we regularly update our offer, which contributes to better transparency and always having the latest models of tools for the home workshop available.

Answers to frequently asked questions

For which types of brake calipers is the pentagon wrench set most useful?

The set is primarily intended for brakes on vehicles where the mounting bolts are pentagonal in shape and standard wrenches are not suitable.

Are these wrenches also compatible with other screw types (e.g. Torx, Allen)?

No, pentagon wrenches are designed exclusively for pentagonal head screws and are not suitable for use on other types of screws.

What should I check before using a pentagon wrench on my vehicle?

Always check before use that you really need a pentagonal bit; choosing the wrong tool can damage the screw or wrench.

Is this set also suitable for a professional workshop?

The set is suitable for home use and basic repairs, but for more frequent or intensive use in a professional environment, it is also advisable to check the robustness and durability according to the needs of the workshop.

Description updated: April 2026