RB UK Twin Slot Upright White 950 x 25mm 2 Pack (84148)

25 mm

There are six screw holes per rail, each of 6 mm diameter. Front face of bracket to wall is 15 mm. I used 5 mm x 60 mm screws and wall plugs. If you use bolts or larger screws, make sure the head diameter is no larger than 10 mm, as otherwise the shelf brackets will not fit over them. You can still fix the rails with larger bolts, but this will limit where you can position the shelves, as the brackets will clash with the bolt/screw heads.

Yes, they can be cut with a metal-saw, but they are thick and string, so try to avoid it. Alternatively, if your 'obstruction' is quite thin, pad out the whole length of upright from the wall with shims. Or, you can buy shorter lengths - the extra cost is saved by avoiding having to cut them.