Available as an option for most stairs with side rails. The mounting method provides a hidden attachment under the step and apart from the aesthetic advantages, it provides an easier and significantly less heavy work for our installers and not least an opportunity to retighten the screws in the stairs after installation.
The step is still attached to the wall piece in the same way, but instead of pulling a screw straight through the wall piece or miter screw, the step is mounted on the special fitting that sits in the wall piece and screwed to the underside of the step. The hole is covered with a cover that can be detached and you can then access the stairs if necessary.