Are you trying to decide between FLEX-FIT and TURBOFLEX for your next glass railing project?
If you’re a glass railing installer, you already know the hassle of tricky adjustments, tilted glass panels, and wasted time on-site. Even with reliable tools, fine-tuning can eat into your schedule, especially when you’re dealing with tight timelines or elevated installs.
So which glass railing system helps you install faster and with fewer errors: FLEXFIT or TURBOFLEX? Both are ONLEVEL products but their features differ.
In this side-by-side comparison guide, you’ll get a clear breakdown of both systems: how they adjust, how fast they install, and what kind of precision you can expect. In this way you can confidently choose the best fit for your next project.
How Do FLEXFIT and TURBOFLEX Adjust Glass?
FLEXFIT uses a wedge-based system for vertical alignment.
Installers insert FLEXFIT wedges into the base profile and fine-tune the glass using a supplied adjustment tool. Even after installation, vertical tilt can still be corrected without demounting the glass.
TURBOFLEX eliminates wedges altogether.
Instead, it allows the installer to make adjustments by hand, directly at the glass panel, with only the torque wrench tool 6N/m. This system simplifies the entire process and is especially useful in tight or elevated spaces.
Which System Installs Faster?
FLEX FIT performs on par with other systems in the market, but Turboflex remains the fastest overall.
With FLEXFIT, all work can be completed from the inside, no scaffolding is required. The design allows for glass adjustment of up to 34 mm, giving installers considerable flexibility. However, in most cases, some precision work and minor alignment adjustments may still be required after installation.
TURBOFLEX enables installation at higher speed compared to conventional solutions by removing the need for wedges, special tools, and most post-install corrections. Glass adjustment is carried out directly on the pane itself, with the wedge following the glass automatically. The wedge is secured with a single screw at 6 Nm torque, minimizing trial-and-error during positioning and reducing the need for later adjustments.
Most importantly: TURBOFLEX does not require any adjustment after installation.
Which System Offers More Precision?
Flex Fit offers horizontal alignment of 1.0° to both sides. This gives solid control for aligning the glass panel angle during installation.
TURBOFLEX offers both horizontal and vertical adjustment including built-in tolerance absorption. You can adjust the glass angle 2° in both directions. The optional glass height adjustment allows for a vertical correction of ±3 mm at each corner of the glass, ensuring a perfectly parallel gap between panels.
Which System Is More Predictable to Plan?
When it comes to planning accuracy, TURBOFLEX sets a higher standard. Its engineering is designed to minimize on-site variability by reducing reliance on adjustment components and tolerances. This translates into:
- Accurate installation estimates with high confidence
- Built-in adjustability, eliminating post installation corrections
- Predictable workflows, ensuring consistent costing
For contractors and project managers, this means better schedule control, clear budgeting, and no unexpected delays. With Turboflex, you can truly plan ahead. Its intuitive hand adjustment makes installation both precise and efficient.
By contrast, FLEXFIT, like many other systems on the market, has less accuracy when it comes to planning. Because alignment does not occur directly on the glass and not the complete range of glass thickness tolerances can be compensated, each adjustment requires multiple attempts. The result is:
- More subsequent corrections
- Extended working times
- Slower, less predictable installations
Unforeseen site conditions, such as uneven floors or technical complications, further increase the risk of schedule disruptions and cost overruns. If accurate planning is of importance to your project, Turbflex is the best choice.
Is There a Cost Difference?
While TURBOFLEX may have a higher upfront hardware cost, the labor savings often outweigh that. By cutting install time and removing adjustment errors, TURBOFLEX reduces total job cost especially for large or complex projects.
FLEXFIT may be more affordable in terms of materials, but requires more installer time, which adds up over multiple jobs.
In short:
- FLEXFIT = Lower materials cost, higher labor time
- TURBOFLEX = Higher materials cost, lower labor time
Do you want to know how much you can save in your next project using Turboflex? Ask for our TURBOFLEX Money Saver Configurator.
As of January 2026, the pricing is as follows: FLEXFIT 1.0 kN is available at €179.40, while TURBOFLEX 1.0 kN is priced at €199.50.
Note: As January 2026, TURBOFLEX is available in 1.0 kN and 1.5 kN versions, whereas FLEXFIT is offered in 0.5 kN, 1.0 kN, and 3.0 kN variants.
Which System Is Easier to Access and Adjust?
FLEXFIT adjusts from the user side with a tool inserted into the base profile.
There’s no need to reach over awkward angles, which helps on balcony or edge installs. TURBOFLEX also adjusts from the user side, with the torque tool.
Installers can align panels by hand, making it easier to work in tight spaces or when operating solo.
Do you want to know more about TURBOFLEX? Read our article