Flexible checking board | CCB 100092 | 1000 mm (39 ³/₈ in) (Flexisander)

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The world's best tools for curved surfaces - Checking board

The flexible contour checking board CCB 100091 is a unique, patented tool for quality control of flat and curved surfaces. Use this tool to quickly and easily check the quality of curves and surfaces.

Due to its size and high flexibility, this type of tool is particularly well suited for inspecting smaller areas or areas with a small radius of curvature.

With this tool, you can easily spot any irregularities and eliminate the repair of defects visible after the final painting. The tool is designed to inspect concave and convex surfaces.

How to make your work precise and easy with Flexible checking board (at: 0:23) 


This is the best tool for step one in the whole process:


Filling and sanding CURVED surfaces is demanding

The main reason is because unlike a wall, ship or car bodies are not flat. They are curved. Unfortunately, ordinary tools are not. With a rigid spatula or a rigid sander, you can notice that it is connected only partly with the surface. More curved the surface is, smaller contact between spatula or sander and your material is. This means uneven layers of filler and badly sanded surface. If you do it ruthlessly, your material suffers. If you want to do it precisely, you sooner or later understand, that you do not have enough time to make it perfect. This tool will help you check the surface on the contracts that really matter to you. It is easy. Use it before to see how much filler will be needed. At the end of the process, you can check how well the whole project went.

See a test that shows our principles:



Dealing with curved surfaces without the right tools is hard! The operator needs to be a very skilled person because every bad move can cause an unevenness or damage. Any unevenness increases friction and thus reduces speed and durability.

It is also very time-consuming activity which is in other words very expensive for companies. No wonder that companies like Boeing, Delphia yachts or Škoda Auto use our products.

What the right tools do for you?

  • Save a lot of time
  • Save costs of a material
  • Versatile usage
  • Eliminates the human factor
  • Perfect result every time


UNIQUE DESIGN - Flexisander flexible checking boards enable an easy and fast continuous quality check of curved and flat surfaces simply by attaching them. The transillumination process will show even the smallest inequalities and defects, which are difficult to detect by human sight or touch only. The technical solution behind the Flexisander flexible checking board was inspired by windshield wipers.

BENEFITS - By using flexible checking boards, you will significantly increase the quality of your surfaces and thus eliminate any future costs associated with the repair of these surfaces after the final finish.

DURABLE CONSTRUCTION - An all-aluminum body guarantees trouble-free long-term use.

APPLICATION - Our Flexisander flexible checking boards are suitable for vehicle body projects, building and repair of ships, the woodworking industry, the composite industry and wherever it is necessary to fill large curved and flat surfaces


When surface quality is on the first place

The first concept of FLEXISANDER/FLEXICAT tools was developed by Petr Froněk, INNOVIA company founder, during the construction of steel yachts.  The basic idea was to develop a tool that would greatly simplify and facilitate the process of very difficult filling and sanding of hulls.

Based on these requirements, a special flexible board has been designed, which is evenly pressed against the filled or sanded surface by means of a plurality of levers. By doing so, it simply creates the desired ideal convex or concave curved surface.

Already during primary testing, significant time savings have been achieved, with the perfect surface quality. Additionally, the tools fundamentally eliminate the so-called human factor.

The first inspiration was for all the well-known and generationally proven car wiper principle. This simple and worldwide everyday principle has been successfully used in the design of the entire FLEXISANDER range of flexible hand-held and machine-driven tools such as control bars, filing plates, hand sanding plates and sanders.

If you would like to know more about us and about technology of your future tools: 




It has a great usage while renovating cars, but you can also make use of it while sanding boat, furniture, airplanes... basically any flat or curved surface. Even walls:


Who already use our tools?

At present, these companies belong among the customers: Boeing (USA), Airbus (EU), Škoda Auto (CZ), Bavaria yachts (DE)Delphia yachts (PL) and hundreds of others from all industry fields plus hobby users. We even got awards for our tools, like Red Dot Design Award, Vodafone The Idea Of The Year, Czech Innovation award and nomination for the best sander technical solution at the renowned international trade fair METS Amsterdam.



You're not risking anything. Use it for a month and if you will find out, that this is not for you, we will refund you.
It is all made of quality steel and professionally made components. It will last you for ages!


Buy the world's best tool for inspection curved surfaces.


In some videos, you could see our pneumatic sanders and electric sanders, feel free to check them here: Flexible power sanders




LENGHT: 1000 mm (39 3/8 in)
WIDTH: 90 mm (3 1/2 in)
WEIGHT: 2.1 Kg (4.6 lb)


Customer Reviews

Based on 1 review
Best checking board I have

Long enough, sturdy but flexible. I love it